56728605 has 16 divisors (see below), whose sum is σ = 93694464. Its totient is φ = 29279040.

The previous prime is 56728579. The next prime is 56728613. The reversal of 56728605 is 50682765.

It is a happy number.

56728605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56728605 - 2¹⁰ = 56727581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60534 + ... + 61463.

It is an arithmetic number, because the mean of its divisors is an integer number (5855904).

Almost surely, 2^56728605 is an apocalyptic number.

It is an amenable number.

56728605 is a deficient number, since it is larger than the sum of its proper divisors (36965859).

56728605 is a wasteful number, since it uses less digits than its factorization.

56728605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122036.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 56728605 is about 7531.8394167693. The cubic root of 56728605 is about 384.2383435151.

The spelling of 56728605 in words is "fifty-six million, seven hundred twenty-eight thousand, six hundred five".