56137820 has 24 divisors (see below), whose sum is σ = 119060928. Its totient is φ = 22232000.

The previous prime is 56137813. The next prime is 56137831. The reversal of 56137820 is 2873165.

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, 11876 + ... + 15915.

It is an arithmetic number, because the mean of its divisors is an integer number (4960872).

Almost surely, 2^56137820 is an apocalyptic number.

It is an amenable number.

56137820 is an abundant number, since it is smaller than the sum of its proper divisors (62923108).

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

56137820 is a wasteful number, since it uses less digits than its factorization.

56137820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27901 (or 27899 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 56137820 is about 7492.5176009136. The cubic root of 56137820 is about 382.8998367827.

The spelling of 56137820 in words is "fifty-six million, one hundred thirty-seven thousand, eight hundred twenty".