672994408 has 8 divisors (see below), whose sum is σ = 1261864530. Its totient is φ = 336497200.

The previous prime is 672994331. The next prime is 672994433. The reversal of 672994408 is 804499276.

It can be written as a sum of positive squares in only one way, i.e., 664711524 + 8282884 = 25782^2 + 2878^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42062143 + ... + 42062158.

Almost surely, 2^672994408 is an apocalyptic number.

It is an amenable number.

672994408 is a deficient number, since it is larger than the sum of its proper divisors (588870122).

672994408 is a wasteful number, since it uses less digits than its factorization.

672994408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84124307 (or 84124303 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 672994408 is about 25942.1357640423. The cubic root of 672994408 is about 876.3356615570.

The spelling of 672994408 in words is "six hundred seventy-two million, nine hundred ninety-four thousand, four hundred eight".