56447745 has 32 divisors (see below), whose sum is σ = 93809664. Its totient is φ = 28953600.

The previous prime is 56447731. The next prime is 56447749. The reversal of 56447745 is 54774465.

It is not a de Polignac number, because 56447745 - 2⁷ = 56447617 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56447697 and 56447706.

It is not an unprimeable number, because it can be changed into a prime (56447749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108085 + ... + 108605.

It is an arithmetic number, because the mean of its divisors is an integer number (2931552).

Almost surely, 2^56447745 is an apocalyptic number.

It is an amenable number.

56447745 is a deficient number, since it is larger than the sum of its proper divisors (37361919).

56447745 is a wasteful number, since it uses less digits than its factorization.

56447745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793.

The product of its digits is 470400, while the sum is 42.

The square root of 56447745 is about 7513.1714342214. The cubic root of 56447745 is about 383.6031802974.

The spelling of 56447745 in words is "fifty-six million, four hundred forty-seven thousand, seven hundred forty-five".