56578477 has 4 divisors (see below), whose sum is σ = 56757276. Its totient is φ = 56399680.

The previous prime is 56578471. The next prime is 56578481. The reversal of 56578477 is 77487565.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13793796 + 42784681 = 3714^2 + 6541^2 .

It is a cyclic number.

It is not a de Polignac number, because 56578477 - 2³ = 56578469 is a prime.

It is a super-2 number, since 2×56578477² = 6402248119279058, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56578477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56578471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88924 + ... + 89557.

It is an arithmetic number, because the mean of its divisors is an integer number (14189319).

Almost surely, 2^56578477 is an apocalyptic number.

It is an amenable number.

56578477 is a deficient number, since it is larger than the sum of its proper divisors (178799).

56578477 is a wasteful number, since it uses less digits than its factorization.

56578477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178798.

The product of its digits is 1646400, while the sum is 49.

The square root of 56578477 is about 7521.8665901490. The cubic root of 56578477 is about 383.8990914142.

The spelling of 56578477 in words is "fifty-six million, five hundred seventy-eight thousand, four hundred seventy-seven".