31004285928 has 192 divisors, whose sum is σ = 98339391360. Its totient is φ = 7972800000.

The previous prime is 31004285927. The next prime is 31004285929. The reversal of 31004285928 is 82958240013.

It is an interprime number because it is at equal distance from previous prime (31004285927) and next prime (31004285929).

It is a super-2 number, since 2×31004285928² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 31004285928.

It is not an unprimeable number, because it can be changed into a prime (31004285927) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2045578 + ... + 2060678.

It is an arithmetic number, because the mean of its divisors is an integer number (512184330).

Almost surely, 2^31004285928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31004285928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49169695680).

31004285928 is an abundant number, since it is smaller than the sum of its proper divisors (67335105432).

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

31004285928 is a wasteful number, since it uses less digits than its factorization.

31004285928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15240 (or 15225 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 31004285928 in words is "thirty-one billion, four million, two hundred eighty-five thousand, nine hundred twenty-eight".