31672071828 has 18 divisors (see below), whose sum is σ = 80059959434. Its totient is φ = 10557357264.

The previous prime is 31672071757. The next prime is 31672071853. The reversal of 31672071828 is 82817027613.

It can be written as a sum of positive squares in only one way, i.e., 29524861584 + 2147210244 = 171828^2 + 46338^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 439889851 + ... + 439889922.

Almost surely, 2^31672071828 is an apocalyptic number.

It is an amenable number.

31672071828 is an abundant number, since it is smaller than the sum of its proper divisors (48387887606).

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

31672071828 is a wasteful number, since it uses less digits than its factorization.

31672071828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879779783 (or 879779778 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 31672071828 in words is "thirty-one billion, six hundred seventy-two million, seventy-one thousand, eight hundred twenty-eight".