23056578 has 12 divisors (see below), whose sum is σ = 49955958. Its totient is φ = 7685520.

The previous prime is 23056571. The next prime is 23056613. The reversal of 23056578 is 87565032.

23056578 is a `hidden beast` number, since 2 + 30 + 56 + 578 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23011209 + 45369 = 4797^2 + 213^2 .

It is not an unprimeable number, because it can be changed into a prime (23056571) 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 5 ways as a sum of consecutive naturals, for example, 640443 + ... + 640478.

Almost surely, 2^23056578 is an apocalyptic number.

23056578 is an abundant number, since it is smaller than the sum of its proper divisors (26899380).

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

23056578 is a wasteful number, since it uses less digits than its factorization.

23056578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280929 (or 1280926 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 23056578 is about 4801.7265644766. The cubic root of 23056578 is about 284.6196958872.

The spelling of 23056578 in words is "twenty-three million, fifty-six thousand, five hundred seventy-eight".