671500872 has 48 divisors (see below), whose sum is σ = 2078456640. Its totient is φ = 191857248.

The previous prime is 671500849. The next prime is 671500903. The reversal of 671500872 is 278005176.

671500872 is a `hidden beast` number, since 6 + 71 + 500 + 87 + 2 = 666.

It is a super-3 number, since 3×671500872³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 665668 + ... + 666675.

It is an arithmetic number, because the mean of its divisors is an integer number (43301180).

Almost surely, 2^671500872 is an apocalyptic number.

It is an amenable number.

671500872 is an abundant number, since it is smaller than the sum of its proper divisors (1406955768).

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

671500872 is a wasteful number, since it uses less digits than its factorization.

671500872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332362 (or 1332355 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 671500872 is about 25913.3338650201. Note that the first 3 decimals coincide. The cubic root of 671500872 is about 875.6869150753.

The spelling of 671500872 in words is "six hundred seventy-one million, five hundred thousand, eight hundred seventy-two".