56218830 has 32 divisors (see below), whose sum is σ = 142863264. Its totient is φ = 14109696.

The previous prime is 56218823. The next prime is 56218859. The reversal of 56218830 is 3881265.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 56218791 and 56218800.

It is a congruent 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, 54607 + ... + 55626.

It is an arithmetic number, because the mean of its divisors is an integer number (4464477).

Almost surely, 2^56218830 is an apocalyptic number.

56218830 is an abundant number, since it is smaller than the sum of its proper divisors (86644434).

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

56218830 is a wasteful number, since it uses less digits than its factorization.

56218830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110260.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 56218830 is about 7497.9217120479. The cubic root of 56218830 is about 383.0839301868.

The spelling of 56218830 in words is "fifty-six million, two hundred eighteen thousand, eight hundred thirty".