56220363828 has 36 divisors (see below), whose sum is σ = 142493619268. Its totient is φ = 18689875200.

The previous prime is 56220363817. The next prime is 56220363839. The reversal of 56220363828 is 82836302265.

56220363828 is a `hidden beast` number, since 5 + 6 + 2 + 2 + 0 + 3 + 638 + 2 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (56220363817) and next prime (56220363839).

It can be written as a sum of positive squares in 2 ways, for example, as 13316698404 + 42903665424 = 115398^2 + 207132^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2079973 + ... + 2106828.

Almost surely, 2^56220363828 is an apocalyptic number.

It is an amenable number.

56220363828 is an abundant number, since it is smaller than the sum of its proper divisors (86273255440).

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

56220363828 is a wasteful number, since it uses less digits than its factorization.

56220363828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187184 (or 4187179 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 56220363828 in words is "fifty-six billion, two hundred twenty million, three hundred sixty-three thousand, eight hundred twenty-eight".