728550520 has 16 divisors (see below), whose sum is σ = 1639238760. Its totient is φ = 291420192.

The previous prime is 728550517. The next prime is 728550547. The reversal of 728550520 is 25055827.

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, 9106842 + ... + 9106921.

Almost surely, 2^728550520 is an apocalyptic number.

It is an amenable number.

728550520 is an abundant number, since it is smaller than the sum of its proper divisors (910688240).

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

728550520 is a wasteful number, since it uses less digits than its factorization.

728550520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18213774 (or 18213770 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 728550520 is about 26991.6750128628. The cubic root of 728550520 is about 899.8149907776.

The spelling of 728550520 in words is "seven hundred twenty-eight million, five hundred fifty thousand, five hundred twenty".