56628730 has 8 divisors (see below), whose sum is σ = 101931732. Its totient is φ = 22651488.

The previous prime is 56628727. The next prime is 56628743. The reversal of 56628730 is 3782665.

56628730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 55219761 + 1408969 = 7431^2 + 1187^2 .

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

It is a super-2 number, since 2×56628730² = 6413626122825800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56628730.

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 3 ways as a sum of consecutive naturals, for example, 2831427 + ... + 2831446.

Almost surely, 2^56628730 is an apocalyptic number.

56628730 is a deficient number, since it is larger than the sum of its proper divisors (45303002).

56628730 is a wasteful number, since it uses less digits than its factorization.

56628730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5662880.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 56628730 is about 7525.2063094642. The cubic root of 56628730 is about 384.0127174969.

The spelling of 56628730 in words is "fifty-six million, six hundred twenty-eight thousand, seven hundred thirty".