31189339880 has 16 divisors (see below), whose sum is σ = 70176014820. Its totient is φ = 12475735936.

The previous prime is 31189339879. The next prime is 31189339889. The reversal of 31189339880 is 8893398113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31143072676 + 46267204 = 176474^2 + 6802^2 .

It is not an unprimeable number, because it can be changed into a prime (31189339889) 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 3 ways as a sum of consecutive naturals, for example, 389866709 + ... + 389866788.

Almost surely, 2^31189339880 is an apocalyptic number.

It is an amenable number.

31189339880 is an abundant number, since it is smaller than the sum of its proper divisors (38986674940).

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

31189339880 is a wasteful number, since it uses less digits than its factorization.

31189339880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779733508 (or 779733504 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 31189339880 in words is "thirty-one billion, one hundred eighty-nine million, three hundred thirty-nine thousand, eight hundred eighty".