57145786 has 4 divisors (see below), whose sum is σ = 85718682. Its totient is φ = 28572892.

The previous prime is 57145783. The next prime is 57145793. The reversal of 57145786 is 68754175.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 5377761 = 7195^2 + 2319^2 .

It is not an unprimeable number, because it can be changed into a prime (57145783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14286445 + ... + 14286448.

Almost surely, 2^57145786 is an apocalyptic number.

57145786 is a deficient number, since it is larger than the sum of its proper divisors (28572896).

57145786 is a wasteful number, since it uses less digits than its factorization.

57145786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28572895.

The product of its digits is 235200, while the sum is 43.

The square root of 57145786 is about 7559.4831833929. The cubic root of 57145786 is about 385.1779376510.

The spelling of 57145786 in words is "fifty-seven million, one hundred forty-five thousand, seven hundred eighty-six".