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31352340 = 2235975387
BaseRepresentation
bin111011110011…
…0011000010100
32011222212022210
41313212120110
531011233330
63035553420
7530330145
oct167463024
964885283
1031352340
1116774528
12a5bb870
1366596a6
144241acc
152b448b0
hex1de6614

31352340 has 48 divisors (see below), whose sum is σ = 88708032. Its totient is φ = 8272896.

The previous prime is 31352333. The next prime is 31352351. The reversal of 31352340 is 4325313.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3127 + ... + 8513.

It is an arithmetic number, because the mean of its divisors is an integer number (1848084).

Almost surely, 231352340 is an apocalyptic number.

31352340 is a gapful number since it is divisible by the number (30) 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 31352340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44354016).

31352340 is an abundant number, since it is smaller than the sum of its proper divisors (57355692).

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

31352340 is a wasteful number, since it uses less digits than its factorization.

31352340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5496 (or 5494 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 31352340 is about 5599.3160296593. The cubic root of 31352340 is about 315.3237286633.

Adding to 31352340 its reverse (4325313), we get a palindrome (35677653).

The spelling of 31352340 in words is "thirty-one million, three hundred fifty-two thousand, three hundred forty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 97 194 291 388 485 582 970 1164 1455 1940 2910 5387 5820 10774 16161 21548 26935 32322 53870 64644 80805 107740 161610 323220 522539 1045078 1567617 2090156 2612695 3135234 5225390 6270468 7838085 10450780 15676170 31352340