56128290 has 32 divisors (see below), whose sum is σ = 139055616. Its totient is φ = 14484480.

The previous prime is 56128279. The next prime is 56128301. The reversal of 56128290 is 9282165.

It is an interprime number because it is at equal distance from previous prime (56128279) and next prime (56128301).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29247 + ... + 31106.

It is an arithmetic number, because the mean of its divisors is an integer number (4345488).

Almost surely, 2^56128290 is an apocalyptic number.

56128290 is an abundant number, since it is smaller than the sum of its proper divisors (82927326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56128290 is a wasteful number, since it uses less digits than its factorization.

56128290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60394.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 56128290 is about 7491.8816061120. The cubic root of 56128290 is about 382.8781684318.

The spelling of 56128290 in words is "fifty-six million, one hundred twenty-eight thousand, two hundred ninety".