56727945 has 20 divisors (see below), whose sum is σ = 101690820. Its totient is φ = 30254688.

The previous prime is 56727943. The next prime is 56727949. The reversal of 56727945 is 54972765.

It can be written as a sum of positive squares in 2 ways, for example, as 32046921 + 24681024 = 5661^2 + 4968^2 .

It is not a de Polignac number, because 56727945 - 2¹ = 56727943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 56727945.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56727943) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 69630 + ... + 70439.

It is an arithmetic number, because the mean of its divisors is an integer number (5084541).

Almost surely, 2^56727945 is an apocalyptic number.

It is an amenable number.

56727945 is a deficient number, since it is larger than the sum of its proper divisors (44962875).

56727945 is a wasteful number, since it uses less digits than its factorization.

56727945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140086 (or 140077 counting only the distinct ones).

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

The square root of 56727945 is about 7531.7956026435. The cubic root of 56727945 is about 384.2368533892.

56727945 divided by its sum of digits (45) gives a palindrome (1260621).

The spelling of 56727945 in words is "fifty-six million, seven hundred twenty-seven thousand, nine hundred forty-five".