56628289 has 8 divisors (see below), whose sum is σ = 58607360. Its totient is φ = 54658800.

The previous prime is 56628283. The next prime is 56628307. The reversal of 56628289 is 98282665.

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 56628289 - 2³ = 56628281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56628281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10882 + ... + 15220.

It is an arithmetic number, because the mean of its divisors is an integer number (7325920).

Almost surely, 2^56628289 is an apocalyptic number.

It is an amenable number.

56628289 is a deficient number, since it is larger than the sum of its proper divisors (1979071).

56628289 is a wasteful number, since it uses less digits than its factorization.

56628289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791.

The product of its digits is 414720, while the sum is 46.

The square root of 56628289 is about 7525.1770078849. The cubic root of 56628289 is about 384.0117206528.

The spelling of 56628289 in words is "fifty-six million, six hundred twenty-eight thousand, two hundred eighty-nine".