31904490478 has 32 divisors (see below), whose sum is σ = 58108446144. Its totient is φ = 12825088512.

The previous prime is 31904490467. The next prime is 31904490479. The reversal of 31904490478 is 87409440913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31904490479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159025 + ... + 298492.

It is an arithmetic number, because the mean of its divisors is an integer number (1815888942).

Almost surely, 2^31904490478 is an apocalyptic number.

31904490478 is a deficient number, since it is larger than the sum of its proper divisors (26203955666).

31904490478 is a wasteful number, since it uses less digits than its factorization.

31904490478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457836.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 31904490478 in words is "thirty-one billion, nine hundred four million, four hundred ninety thousand, four hundred seventy-eight".