31162861928 has 32 divisors (see below), whose sum is σ = 63765900000. Its totient is φ = 14159674560.

The previous prime is 31162861927. The next prime is 31162861957. The reversal of 31162861928 is 82916826113.

It is a happy number.

It is a super-2 number, since 2×31162861928² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31162861927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177503 + ... + 306321.

It is an arithmetic number, because the mean of its divisors is an integer number (1992684375).

Almost surely, 2^31162861928 is an apocalyptic number.

It is an amenable number.

31162861928 is an abundant number, since it is smaller than the sum of its proper divisors (32603038072).

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

31162861928 is a wasteful number, since it uses less digits than its factorization.

31162861928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131585 (or 131581 counting only the distinct ones).

The product of its digits is 248832, while the sum is 47.

The spelling of 31162861928 in words is "thirty-one billion, one hundred sixty-two million, eight hundred sixty-one thousand, nine hundred twenty-eight".