56440643 has 8 divisors (see below), whose sum is σ = 67308288. Its totient is φ = 46274184.

The previous prime is 56440633. The next prime is 56440649. The reversal of 56440643 is 34604465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56440643 - 2⁴ = 56440627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56440649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175121 + ... + 175442.

It is an arithmetic number, because the mean of its divisors is an integer number (8413536).

Almost surely, 2^56440643 is an apocalyptic number.

56440643 is a deficient number, since it is larger than the sum of its proper divisors (10867645).

56440643 is a wasteful number, since it uses less digits than its factorization.

56440643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350593.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 56440643 is about 7512.6987827278. The cubic root of 56440643 is about 383.5870918835.

The spelling of 56440643 in words is "fifty-six million, four hundred forty thousand, six hundred forty-three".