31160040 has 32 divisors (see below), whose sum is σ = 93480480. Its totient is φ = 8309312.

The previous prime is 31160039. The next prime is 31160069. The reversal of 31160040 is 4006113.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129714 + ... + 129953.

It is an arithmetic number, because the mean of its divisors is an integer number (2921265).

Almost surely, 2^31160040 is an apocalyptic number.

31160040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31160040 is an abundant number, since it is smaller than the sum of its proper divisors (62320440).

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

31160040 is a wasteful number, since it uses less digits than its factorization.

31160040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259681 (or 259677 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31160040 is about 5582.1178776518. The cubic root of 31160040 is about 314.6777253208.

Adding to 31160040 its reverse (4006113), we get a palindrome (35166153).

The spelling of 31160040 in words is "thirty-one million, one hundred sixty thousand, forty".