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140043420 = 223251170729
BaseRepresentation
bin10000101100011…
…10010010011100
3100202111221110100
420112032102130
5241322342140
621521341100
73320230566
oct1026162234
9322457410
10140043420
1172061770
123aa97790
132302403a
1414856336
15c464530
hex858e49c

140043420 has 72 divisors (see below), whose sum is σ = 463422960. Its totient is φ = 33949440.

The previous prime is 140043401. The next prime is 140043427. The reversal of 140043420 is 24340041.

It is a super-2 number, since 2×1400434202 = 39224318970592800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 140043393 and 140043402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140043427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33385 + ... + 37344.

It is an arithmetic number, because the mean of its divisors is an integer number (6436430).

Almost surely, 2140043420 is an apocalyptic number.

140043420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140043420 is an abundant number, since it is smaller than the sum of its proper divisors (323379540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140043420 is a wasteful number, since it uses less digits than its factorization.

140043420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70755 (or 70750 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 140043420 is about 11833.9942538435. The cubic root of 140043420 is about 519.3030851351.

Adding to 140043420 its reverse (24340041), we get a palindrome (164383461).

It can be divided in two parts, 14004 and 3420, that added together give a square (17424 = 1322).

The spelling of 140043420 in words is "one hundred forty million, forty-three thousand, four hundred twenty".

Divisors: 1 2 3 4 5 6 9 10 11 12 15 18 20 22 30 33 36 44 45 55 60 66 90 99 110 132 165 180 198 220 330 396 495 660 990 1980 70729 141458 212187 282916 353645 424374 636561 707290 778019 848748 1060935 1273122 1414580 1556038 2121870 2334057 2546244 3112076 3182805 3890095 4243740 4668114 6365610 7002171 7780190 9336228 11670285 12731220 14004342 15560380 23340570 28008684 35010855 46681140 70021710 140043420