31872861876 has 48 divisors (see below), whose sum is σ = 78757479360. Its totient is φ = 9997708800.

The previous prime is 31872861871. The next prime is 31872861929. The reversal of 31872861876 is 67816827813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31872861871) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2165470 + ... + 2180138.

It is an arithmetic number, because the mean of its divisors is an integer number (1640780820).

Almost surely, 2^31872861876 is an apocalyptic number.

It is an amenable number.

31872861876 is an abundant number, since it is smaller than the sum of its proper divisors (46884617484).

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

31872861876 is a wasteful number, since it uses less digits than its factorization.

31872861876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25344 (or 25342 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 57.

The spelling of 31872861876 in words is "thirty-one billion, eight hundred seventy-two million, eight hundred sixty-one thousand, eight hundred seventy-six".