31127987904 has 224 divisors, whose sum is σ = 94293513216. Its totient is φ = 8977858560.

The previous prime is 31127987873. The next prime is 31127987977. The reversal of 31127987904 is 40978972113.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11497719 + ... + 11500425.

It is an arithmetic number, because the mean of its divisors is an integer number (420953184).

Almost surely, 2^31127987904 is an apocalyptic number.

31127987904 is a gapful number since it is divisible by the number (34) 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 31127987904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47146756608).

31127987904 is an abundant number, since it is smaller than the sum of its proper divisors (63165525312).

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

31127987904 is a wasteful number, since it uses less digits than its factorization.

31127987904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023 (or 3013 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 31127987904 in words is "thirty-one billion, one hundred twenty-seven million, nine hundred eighty-seven thousand, nine hundred four".