672749440 has 64 divisors (see below), whose sum is σ = 1754518320. Its totient is φ = 244633600.

The previous prime is 672749431. The next prime is 672749461. The reversal of 672749440 is 44947276.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 40741 + ... + 54820.

Almost surely, 2^672749440 is an apocalyptic number.

It is an amenable number.

672749440 is an abundant number, since it is smaller than the sum of its proper divisors (1081768880).

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

672749440 is a wasteful number, since it uses less digits than its factorization.

672749440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95591 (or 95579 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 672749440 is about 25937.4139034716. The cubic root of 672749440 is about 876.2293207791.

The spelling of 672749440 in words is "six hundred seventy-two million, seven hundred forty-nine thousand, four hundred forty".