56643420 has 48 divisors (see below), whose sum is σ = 159022080. Its totient is φ = 15064896.

The previous prime is 56643403. The next prime is 56643437. The reversal of 56643420 is 2434665.

56643420 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 (56643403) and next prime (56643437).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 26761 + ... + 28799.

It is an arithmetic number, because the mean of its divisors is an integer number (3312960).

Almost surely, 2^56643420 is an apocalyptic number.

It is an amenable number.

56643420 is an abundant number, since it is smaller than the sum of its proper divisors (102378660).

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

56643420 is a wasteful number, since it uses less digits than its factorization.

56643420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514 (or 2512 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 56643420 is about 7526.1822991474. The cubic root of 56643420 is about 384.0459200727.

The spelling of 56643420 in words is "fifty-six million, six hundred forty-three thousand, four hundred twenty".