672708728 has 8 divisors (see below), whose sum is σ = 1261328880. Its totient is φ = 336354360.

The previous prime is 672708719. The next prime is 672708739. The reversal of 672708728 is 827807276.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42044288 + ... + 42044303.

It is an arithmetic number, because the mean of its divisors is an integer number (157666110).

Almost surely, 2^672708728 is an apocalyptic number.

It is an amenable number.

672708728 is a deficient number, since it is larger than the sum of its proper divisors (588620152).

672708728 is a wasteful number, since it uses less digits than its factorization.

672708728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84088597 (or 84088593 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 47.

The square root of 672708728 is about 25936.6290793542. The cubic root of 672708728 is about 876.2116451704.

The spelling of 672708728 in words is "six hundred seventy-two million, seven hundred eight thousand, seven hundred twenty-eight".