56737820 has 24 divisors (see below), whose sum is σ = 120267504. Its totient is φ = 22482176.

The previous prime is 56737817. The next prime is 56737841. The reversal of 56737820 is 2873765.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11117 + ... + 15396.

It is an arithmetic number, because the mean of its divisors is an integer number (5011146).

Almost surely, 2^56737820 is an apocalyptic number.

It is an amenable number.

56737820 is an abundant number, since it is smaller than the sum of its proper divisors (63529684).

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

56737820 is a wasteful number, since it uses less digits than its factorization.

56737820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26629 (or 26627 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 56737820 is about 7532.4511282849. The cubic root of 56737820 is about 384.2591476263.

The spelling of 56737820 in words is "fifty-six million, seven hundred thirty-seven thousand, eight hundred twenty".