56206820 has 12 divisors (see below), whose sum is σ = 118034364. Its totient is φ = 22482720.

The previous prime is 56206819. The next prime is 56206873. The reversal of 56206820 is 2860265.

It can be written as a sum of positive squares in 2 ways, for example, as 27541504 + 28665316 = 5248^2 + 5354^2 .

It is a super-2 number, since 2×56206820² = 6318413229024800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405151 + ... + 1405190.

It is an arithmetic number, because the mean of its divisors is an integer number (9836197).

Almost surely, 2^56206820 is an apocalyptic number.

It is an amenable number.

56206820 is an abundant number, since it is smaller than the sum of its proper divisors (61827544).

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

56206820 is a wasteful number, since it uses less digits than its factorization.

56206820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810350 (or 2810348 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 56206820 is about 7497.1207806731. The cubic root of 56206820 is about 383.0566489025.

The spelling of 56206820 in words is "fifty-six million, two hundred six thousand, eight hundred twenty".