31077422728 has 32 divisors (see below), whose sum is σ = 65285501760. Its totient is φ = 13744313280.

The previous prime is 31077422681. The next prime is 31077422731. The reversal of 31077422728 is 82722477013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4769076 + ... + 4775587.

It is an arithmetic number, because the mean of its divisors is an integer number (2040171930).

Almost surely, 2^31077422728 is an apocalyptic number.

It is an amenable number.

31077422728 is an abundant number, since it is smaller than the sum of its proper divisors (34208079032).

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

31077422728 is a wasteful number, since it uses less digits than its factorization.

31077422728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9544717 (or 9544713 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 43.

The spelling of 31077422728 in words is "thirty-one billion, seventy-seven million, four hundred twenty-two thousand, seven hundred twenty-eight".