671535872 has 36 divisors (see below), whose sum is σ = 1531945296. Its totient is φ = 287800320.

The previous prime is 671535871. The next prime is 671535877. The reversal of 671535872 is 278535176.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (671535871) 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, 185579 + ... + 189162.

It is an arithmetic number, because the mean of its divisors is an integer number (42554036).

Almost surely, 2^671535872 is an apocalyptic number.

It is an amenable number.

671535872 is an abundant number, since it is smaller than the sum of its proper divisors (860409424).

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

671535872 is an equidigital number, since it uses as much as digits as its factorization.

671535872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374764 (or 374750 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The square root of 671535872 is about 25914.0091842231. The cubic root of 671535872 is about 875.7021290091.

The spelling of 671535872 in words is "six hundred seventy-one million, five hundred thirty-five thousand, eight hundred seventy-two".