57478745 has 16 divisors (see below), whose sum is σ = 71451072. Its totient is φ = 44358720.

The previous prime is 57478727. The next prime is 57478747. The reversal of 57478745 is 54787475.

It is a happy number.

It is not a de Polignac number, because 57478745 - 2²⁰ = 56430169 is a prime.

It is a super-2 number, since 2×57478745² = 6607612253550050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57478745.

It is not an unprimeable number, because it can be changed into a prime (57478747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16235 + ... + 19455.

It is an arithmetic number, because the mean of its divisors is an integer number (4465692).

Almost surely, 2^57478745 is an apocalyptic number.

It is an amenable number.

57478745 is a deficient number, since it is larger than the sum of its proper divisors (13972327).

57478745 is a wasteful number, since it uses less digits than its factorization.

57478745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352.

The product of its digits is 1097600, while the sum is 47.

The square root of 57478745 is about 7581.4738013133. The cubic root of 57478745 is about 385.9245671277.

The spelling of 57478745 in words is "fifty-seven million, four hundred seventy-eight thousand, seven hundred forty-five".