671131904 has 36 divisors (see below), whose sum is σ = 1397899776. Its totient is φ = 320973312.

The previous prime is 671131897. The next prime is 671131907. The reversal of 671131904 is 409131176.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (671131907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51104 + ... + 62879.

Almost surely, 2^671131904 is an apocalyptic number.

671131904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

671131904 is an abundant number, since it is smaller than the sum of its proper divisors (726767872).

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

671131904 is a wasteful number, since it uses less digits than its factorization.

671131904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114022 (or 114008 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 671131904 is about 25906.2136175860. The cubic root of 671131904 is about 875.5264984827.

The spelling of 671131904 in words is "six hundred seventy-one million, one hundred thirty-one thousand, nine hundred four".