672644 has 12 divisors (see below), whose sum is σ = 1345344. Its totient is φ = 288264.

The previous prime is 672643. The next prime is 672653. The reversal of 672644 is 446276.

672644 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 672644.

It is not an unprimeable number, because it can be changed into a prime (672641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11984 + ... + 12039.

It is an arithmetic number, because the mean of its divisors is an integer number (112112).

2⁶⁷²⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

672644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

672644 is a wasteful number, since it uses less digits than its factorization.

672644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24034 (or 24032 counting only the distinct ones).

The product of its digits is 8064, while the sum is 29.

The square root of 672644 is about 820.1487669929. The cubic root of 672644 is about 87.6183541255.

The spelling of 672644 in words is "six hundred seventy-two thousand, six hundred forty-four".