672144736 has 24 divisors (see below), whose sum is σ = 1324701000. Its totient is φ = 335712768.

The previous prime is 672144721. The next prime is 672144743. The reversal of 672144736 is 637441276.

It is a super-2 number, since 2×672144736² = 903557092265019392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20515 + ... + 42013.

It is an arithmetic number, because the mean of its divisors is an integer number (55195875).

Almost surely, 2^672144736 is an apocalyptic number.

It is an amenable number.

672144736 is a deficient number, since it is larger than the sum of its proper divisors (652556264).

672144736 is a wasteful number, since it uses less digits than its factorization.

672144736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22486 (or 22478 counting only the distinct ones).

The product of its digits is 169344, while the sum is 40.

The square root of 672144736 is about 25925.7542995377. The cubic root of 672144736 is about 875.9667077970.

The spelling of 672144736 in words is "six hundred seventy-two million, one hundred forty-four thousand, seven hundred thirty-six".