31879628188 has 12 divisors (see below), whose sum is σ = 55811496832. Its totient is φ = 15933486240.

The previous prime is 31879628161. The next prime is 31879628189. The reversal of 31879628188 is 88182697813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31879628189) 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, 1570620 + ... + 1590787.

Almost surely, 2^31879628188 is an apocalyptic number.

It is an amenable number.

31879628188 is a deficient number, since it is larger than the sum of its proper divisors (23931868644).

31879628188 is a wasteful number, since it uses less digits than its factorization.

31879628188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163932 (or 3163930 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 61.

The spelling of 31879628188 in words is "thirty-one billion, eight hundred seventy-nine million, six hundred twenty-eight thousand, one hundred eighty-eight".