31428872888808 has 64 divisors (see below), whose sum is σ = 82009451779200. Its totient is φ = 10018222663680.

The previous prime is 31428872888807. The next prime is 31428872888867. The reversal of 31428872888808 is 80888827882413.

It is a self number, because there is not a number n which added to its sum of digits gives 31428872888808.

It is not an unprimeable number, because it can be changed into a prime (31428872888807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5173453 + ... + 9466908.

It is an arithmetic number, because the mean of its divisors is an integer number (1281397684050).

Almost surely, 2^{31428872888808} is an apocalyptic number.

It is an amenable number.

31428872888808 is an abundant number, since it is smaller than the sum of its proper divisors (50580578890392).

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

31428872888808 is a wasteful number, since it uses less digits than its factorization.

31428872888808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14644282 (or 14644278 counting only the distinct ones).

The product of its (nonzero) digits is 704643072, while the sum is 75.

The spelling of 31428872888808 in words is "thirty-one trillion, four hundred twenty-eight billion, eight hundred seventy-two million, eight hundred eighty-eight thousand, eight hundred eight".