728456859 has 12 divisors (see below), whose sum is σ = 1133155296. Its totient is φ = 448281072.

The previous prime is 728456843. The next prime is 728456863. The reversal of 728456859 is 958654827.

728456859 is a `hidden beast` number, since 7 + 28 + 4 + 568 + 59 = 666.

It is not a de Polignac number, because 728456859 - 2⁴ = 728456843 is a prime.

It is a super-3 number, since 3×728456859³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (728456819) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3112947 + ... + 3113180.

It is an arithmetic number, because the mean of its divisors is an integer number (94429608).

Almost surely, 2^728456859 is an apocalyptic number.

728456859 is a deficient number, since it is larger than the sum of its proper divisors (404698437).

728456859 is a wasteful number, since it uses less digits than its factorization.

728456859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6226146 (or 6226143 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 728456859 is about 26989.9399591774. The cubic root of 728456859 is about 899.7764296523.

The spelling of 728456859 in words is "seven hundred twenty-eight million, four hundred fifty-six thousand, eight hundred fifty-nine".