728551870 has 16 divisors (see below), whose sum is σ = 1311701040. Its totient is φ = 291352384.

The previous prime is 728551819. The next prime is 728551921. The reversal of 728551870 is 78155827.

It is an interprime number because it is at equal distance from previous prime (728551819) and next prime (728551921).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76746 + ... + 85714.

It is an arithmetic number, because the mean of its divisors is an integer number (81981315).

Almost surely, 2^728551870 is an apocalyptic number.

728551870 is a deficient number, since it is larger than the sum of its proper divisors (583149170).

728551870 is a wasteful number, since it uses less digits than its factorization.

728551870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17099.

The product of its (nonzero) digits is 156800, while the sum is 43.

The square root of 728551870 is about 26991.7000205619. The cubic root of 728551870 is about 899.8155465613.

The spelling of 728551870 in words is "seven hundred twenty-eight million, five hundred fifty-one thousand, eight hundred seventy".