56643340 has 24 divisors (see below), whose sum is σ = 128101680. Its totient is φ = 20914368.

The previous prime is 56643331. The next prime is 56643359. The reversal of 56643340 is 4334665.

It is an unprimeable number.

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, 108670 + ... + 109189.

It is an arithmetic number, because the mean of its divisors is an integer number (5337570).

Almost surely, 2^56643340 is an apocalyptic number.

It is an amenable number.

56643340 is an abundant number, since it is smaller than the sum of its proper divisors (71458340).

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

56643340 is a wasteful number, since it uses less digits than its factorization.

56643340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217881 (or 217879 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 56643340 is about 7526.1769843660. The cubic root of 56643340 is about 384.0457392710.

The spelling of 56643340 in words is "fifty-six million, six hundred forty-three thousand, three hundred forty".