56642388 has 24 divisors (see below), whose sum is σ = 144180960. Its totient is φ = 17164320.

The previous prime is 56642371. The next prime is 56642389. The reversal of 56642388 is 88324665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56642389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214423 + ... + 214686.

It is an arithmetic number, because the mean of its divisors is an integer number (6007540).

Almost surely, 2^56642388 is an apocalyptic number.

It is an amenable number.

56642388 is an abundant number, since it is smaller than the sum of its proper divisors (87538572).

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

56642388 is a wasteful number, since it uses less digits than its factorization.

56642388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429127 (or 429125 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 56642388 is about 7526.1137381786. The cubic root of 56642388 is about 384.0435877171.

The spelling of 56642388 in words is "fifty-six million, six hundred forty-two thousand, three hundred eighty-eight".