56705647 has 8 divisors (see below), whose sum is σ = 57728000. Its totient is φ = 55691064.

The previous prime is 56705639. The next prime is 56705657. The reversal of 56705647 is 74650765.

It is a happy number.

56705647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 56705647 - 2³ = 56705639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56705657) 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, 13918 + ... + 17524.

It is an arithmetic number, because the mean of its divisors is an integer number (7216000).

Almost surely, 2^56705647 is an apocalyptic number.

56705647 is a deficient number, since it is larger than the sum of its proper divisors (1022353).

56705647 is a wasteful number, since it uses less digits than its factorization.

56705647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 56705647 is about 7530.3151992463. The cubic root of 56705647 is about 384.1865029186.

The spelling of 56705647 in words is "fifty-six million, seven hundred five thousand, six hundred forty-seven".