728658936 has 64 divisors (see below), whose sum is σ = 2027520000. Its totient is φ = 242470368.

The previous prime is 728658923. The next prime is 728658943. The reversal of 728658936 is 639856827.

It is a happy number.

728658936 is a `hidden beast` number, since 7 + 28 + 6 + 589 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139785 + ... + 144903.

It is an arithmetic number, because the mean of its divisors is an integer number (31680000).

Almost surely, 2^728658936 is an apocalyptic number.

It is an amenable number.

728658936 is an abundant number, since it is smaller than the sum of its proper divisors (1298861064).

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

728658936 is a wasteful number, since it uses less digits than its factorization.

728658936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5793 (or 5783 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 728658936 is about 26993.6832610891. The cubic root of 728658936 is about 899.8596225502.

The spelling of 728658936 in words is "seven hundred twenty-eight million, six hundred fifty-eight thousand, nine hundred thirty-six".