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140140 = 225721113
BaseRepresentation
bin100010001101101100
321010020101
4202031230
513441030
63000444
71122400
oct421554
9233211
10140140
1196320
1269124
134ba30
1439100
152b7ca
hex2236c

140140 has 72 divisors (see below), whose sum is σ = 402192. Its totient is φ = 40320.

The previous prime is 140123. The next prime is 140143. The reversal of 140140 is 41041.

Adding to 140140 its reverse (41041), we get a palindrome (181181).

Subtracting from 140140 its reverse (41041), we obtain a palindrome (99099).

It can be divided in two parts, 1401 and 40, that added together give a palindrome (1441).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a plaindrome in base 16.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (140143) 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, 10774 + ... + 10786.

It is an arithmetic number, because the mean of its divisors is an integer number (5586).

2140140 is an apocalyptic number.

140140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201096).

140140 is an abundant number, since it is smaller than the sum of its proper divisors (262052).

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

140140 is a wasteful number, since it uses less digits than its factorization.

140140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 140140 is about 374.3527747994. The cubic root of 140140 is about 51.9422435659.

The spelling of 140140 in words is "one hundred forty thousand, one hundred forty", and thus it is an iban number.

Divisors: 1 2 4 5 7 10 11 13 14 20 22 26 28 35 44 49 52 55 65 70 77 91 98 110 130 140 143 154 182 196 220 245 260 286 308 364 385 455 490 539 572 637 715 770 910 980 1001 1078 1274 1430 1540 1820 2002 2156 2548 2695 2860 3185 4004 5005 5390 6370 7007 10010 10780 12740 14014 20020 28028 35035 70070 140140