57238739 has 8 divisors (see below), whose sum is σ = 58134720. Its totient is φ = 56347200.

The previous prime is 57238733. The next prime is 57238751. The reversal of 57238739 is 93783275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57238739 - 2⁸ = 57238483 is a prime.

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 57238739.

It is not an unprimeable number, because it can be changed into a prime (57238733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32399 + ... + 34119.

It is an arithmetic number, because the mean of its divisors is an integer number (7266840).

Almost surely, 2^57238739 is an apocalyptic number.

57238739 is a deficient number, since it is larger than the sum of its proper divisors (895981).

57238739 is a wasteful number, since it uses less digits than its factorization.

57238739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221.

The product of its digits is 317520, while the sum is 44.

The square root of 57238739 is about 7565.6287907880. The cubic root of 57238739 is about 385.3866672431.

The spelling of 57238739 in words is "fifty-seven million, two hundred thirty-eight thousand, seven hundred thirty-nine".