56728801 has 8 divisors (see below), whose sum is σ = 57576960. Its totient is φ = 55886208.

The previous prime is 56728783. The next prime is 56728817. The reversal of 56728801 is 10882765.

56728801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56728801 - 2⁷ = 56728673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56728891) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 21960 + ... + 24406.

It is an arithmetic number, because the mean of its divisors is an integer number (7197120).

Almost surely, 2^56728801 is an apocalyptic number.

It is an amenable number.

56728801 is a deficient number, since it is larger than the sum of its proper divisors (848159).

56728801 is a wasteful number, since it uses less digits than its factorization.

56728801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 56728801 is about 7531.8524281879. The cubic root of 56728801 is about 384.2387860351.

The spelling of 56728801 in words is "fifty-six million, seven hundred twenty-eight thousand, eight hundred one".