56578 has 4 divisors (see below), whose sum is σ = 84870. Its totient is φ = 28288.

The previous prime is 56569. The next prime is 56591. The reversal of 56578 is 87565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34969 + 21609 = 187^2 + 147^2 .

It is a super-3 number, since 3×56578³ = 543330429637656, which contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is a nialpdrome in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14143 + ... + 14146.

2⁵⁶⁵⁷⁸ is an apocalyptic number.

56578 is a deficient number, since it is larger than the sum of its proper divisors (28292).

56578 is a wasteful number, since it uses less digits than its factorization.

56578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28291.

The product of its digits is 8400, while the sum is 31.

The square root of 56578 is about 237.8613041249. The cubic root of 56578 is about 38.3898012557.

It can be divided in two parts, 5657 and 8, that added together give a palindrome (5665).

The spelling of 56578 in words is "fifty-six thousand, five hundred seventy-eight".