31488227928 has 256 divisors, whose sum is σ = 92565504000. Its totient is φ = 9904809600.

The previous prime is 31488227923. The next prime is 31488227929. The reversal of 31488227928 is 82972288413.

31488227928 is a `hidden beast` number, since 314 + 88 + 227 + 9 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31488227923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50869203 + ... + 50869821.

It is an arithmetic number, because the mean of its divisors is an integer number (361584000).

Almost surely, 2^31488227928 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 31488227928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46282752000).

31488227928 is an abundant number, since it is smaller than the sum of its proper divisors (61077276072).

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

31488227928 is a wasteful number, since it uses less digits than its factorization.

31488227928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843 (or 833 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 31488227928 in words is "thirty-one billion, four hundred eighty-eight million, two hundred twenty-seven thousand, nine hundred twenty-eight".