672990816 has 48 divisors (see below), whose sum is σ = 1796558400. Its totient is φ = 220526208.

The previous prime is 672990803. The next prime is 672990839. The reversal of 672990816 is 618099276.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53746 + ... + 65073.

It is an arithmetic number, because the mean of its divisors is an integer number (37428300).

Almost surely, 2^672990816 is an apocalyptic number.

It is an amenable number.

672990816 is an abundant number, since it is smaller than the sum of its proper divisors (1123567584).

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

672990816 is a wasteful number, since it uses less digits than its factorization.

672990816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118891 (or 118883 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 672990816 is about 25942.0665329499. The cubic root of 672990816 is about 876.3341024538.

The spelling of 672990816 in words is "six hundred seventy-two million, nine hundred ninety thousand, eight hundred sixteen".