56649340 has 24 divisors (see below), whose sum is σ = 129778992. Its totient is φ = 20599680.

The previous prime is 56649323. The next prime is 56649343. The reversal of 56649340 is 4394665.

It is a happy number.

56649340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 56649340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56649343) 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 7 ways as a sum of consecutive naturals, for example, 128529 + ... + 128968.

It is an arithmetic number, because the mean of its divisors is an integer number (5407458).

Almost surely, 2^56649340 is an apocalyptic number.

It is an amenable number.

56649340 is an abundant number, since it is smaller than the sum of its proper divisors (73129652).

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

56649340 is a wasteful number, since it uses less digits than its factorization.

56649340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257517 (or 257515 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 56649340 is about 7526.5755825608. The cubic root of 56649340 is about 384.0592989297.

The spelling of 56649340 in words is "fifty-six million, six hundred forty-nine thousand, three hundred forty".