31947874398 has 48 divisors (see below), whose sum is σ = 75741449472. Its totient is φ = 9651906000.

The previous prime is 31947874381. The next prime is 31947874411. The reversal of 31947874398 is 89347874913.

31947874398 is a `hidden beast` number, since 3 + 1 + 9 + 478 + 74 + 3 + 98 = 666.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 178198 + ... + 309273.

It is an arithmetic number, because the mean of its divisors is an integer number (1577946864).

Almost surely, 2^31947874398 is an apocalyptic number.

31947874398 is an abundant number, since it is smaller than the sum of its proper divisors (43793575074).

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

31947874398 is a wasteful number, since it uses less digits than its factorization.

31947874398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487821 (or 487818 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

It can be divided in two parts, 3194787 and 4398, that added together give a triangular number (3199185 = T₂₅₂₉).

The spelling of 31947874398 in words is "thirty-one billion, nine hundred forty-seven million, eight hundred seventy-four thousand, three hundred ninety-eight".