56745972 has 18 divisors (see below), whose sum is σ = 143441298. Its totient is φ = 18915312.

The previous prime is 56745959. The next prime is 56745973. The reversal of 56745972 is 27954765.

56745972 is a `hidden beast` number, since 56 + 7 + 4 + 597 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 31404816 + 25341156 = 5604^2 + 5034^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56745973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 788103 + ... + 788174.

It is an arithmetic number, because the mean of its divisors is an integer number (7968961).

Almost surely, 2^56745972 is an apocalyptic number.

It is an amenable number.

56745972 is an abundant number, since it is smaller than the sum of its proper divisors (86695326).

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

56745972 is a wasteful number, since it uses less digits than its factorization.

56745972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576287 (or 1576282 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 56745972 is about 7532.9922341657. The cubic root of 56745972 is about 384.2775499933.

The spelling of 56745972 in words is "fifty-six million, seven hundred forty-five thousand, nine hundred seventy-two".