56447772 has 12 divisors (see below), whose sum is σ = 131711496. Its totient is φ = 18815920.

The previous prime is 56447759. The next prime is 56447821. The reversal of 56447772 is 27774465.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2351979 + ... + 2352002.

It is an arithmetic number, because the mean of its divisors is an integer number (10975958).

Almost surely, 2^56447772 is an apocalyptic number.

It is an amenable number.

56447772 is an abundant number, since it is smaller than the sum of its proper divisors (75263724).

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

56447772 is a wasteful number, since it uses less digits than its factorization.

56447772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703988 (or 4703986 counting only the distinct ones).

The product of its digits is 329280, while the sum is 42.

The square root of 56447772 is about 7513.1732310656. The cubic root of 56447772 is about 383.6032414589.

The spelling of 56447772 in words is "fifty-six million, four hundred forty-seven thousand, seven hundred seventy-two".