671957632 has 32 divisors (see below), whose sum is σ = 1357538400. Its totient is φ = 331242240.

The previous prime is 671957593. The next prime is 671957633. The reversal of 671957632 is 236759176.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (671957633) 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, 27882 + ... + 46057.

It is an arithmetic number, because the mean of its divisors is an integer number (42423075).

Almost surely, 2^671957632 is an apocalyptic number.

It is an amenable number.

671957632 is an abundant number, since it is smaller than the sum of its proper divisors (685580768).

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

671957632 is an equidigital number, since it uses as much as digits as its factorization.

671957632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74024 (or 74012 counting only the distinct ones).

The product of its digits is 476280, while the sum is 46.

The square root of 671957632 is about 25922.1455902092. The cubic root of 671957632 is about 875.8854197071.

The spelling of 671957632 in words is "six hundred seventy-one million, nine hundred fifty-seven thousand, six hundred thirty-two".