56687380 has 12 divisors (see below), whose sum is σ = 119043540. Its totient is φ = 22674944.

The previous prime is 56687359. The next prime is 56687383. The reversal of 56687380 is 8378665.

56687380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9847044 + 46840336 = 3138^2 + 6844^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56687383) 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 3 ways as a sum of consecutive naturals, for example, 1417165 + ... + 1417204.

It is an arithmetic number, because the mean of its divisors is an integer number (9920295).

Almost surely, 2^56687380 is an apocalyptic number.

It is an amenable number.

56687380 is an abundant number, since it is smaller than the sum of its proper divisors (62356160).

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

56687380 is a wasteful number, since it uses less digits than its factorization.

56687380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834378 (or 2834376 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 56687380 is about 7529.1022041144. The cubic root of 56687380 is about 384.1452448962.

The spelling of 56687380 in words is "fifty-six million, six hundred eighty-seven thousand, three hundred eighty".