56969820 has 36 divisors (see below), whose sum is σ = 172809000. Its totient is φ = 15191904.

The previous prime is 56969819. The next prime is 56969821. The reversal of 56969820 is 2896965.

56969820 is a `hidden beast` number, since 569 + 6 + 9 + 82 + 0 = 666.

56969820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56969819) and next prime (56969821).

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

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56969821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158070 + ... + 158429.

It is an arithmetic number, because the mean of its divisors is an integer number (4800250).

Almost surely, 2^56969820 is an apocalyptic number.

It is an amenable number.

56969820 is an abundant number, since it is smaller than the sum of its proper divisors (115839180).

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

56969820 is a wasteful number, since it uses less digits than its factorization.

56969820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316514 (or 316509 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 56969820 is about 7547.8354513066. The cubic root of 56969820 is about 384.7821784673.

The spelling of 56969820 in words is "fifty-six million, nine hundred sixty-nine thousand, eight hundred twenty".