672520728 has 64 divisors (see below), whose sum is σ = 1836633600. Its totient is φ = 203518080.

The previous prime is 672520711. The next prime is 672520729. The reversal of 672520728 is 827025276.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672520729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281025 + ... + 283407.

It is an arithmetic number, because the mean of its divisors is an integer number (28697400).

Almost surely, 2^672520728 is an apocalyptic number.

It is an amenable number.

672520728 is an abundant number, since it is smaller than the sum of its proper divisors (1164112872).

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

672520728 is a wasteful number, since it uses less digits than its factorization.

672520728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472 (or 3468 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 672520728 is about 25933.0046080280. The cubic root of 672520728 is about 876.1300134377.

The spelling of 672520728 in words is "six hundred seventy-two million, five hundred twenty thousand, seven hundred twenty-eight".