239388057 has 6 divisors (see below), whose sum is σ = 345782762. Its totient is φ = 159592032.

The previous prime is 239388041. The next prime is 239388077. The reversal of 239388057 is 750883932.

It can be written as a sum of positive squares in only one way, i.e., 214944921 + 24443136 = 14661^2 + 4944^2 .

It is not a de Polignac number, because 239388057 - 2⁴ = 239388041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239388007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13299328 + ... + 13299345.

Almost surely, 2^239388057 is an apocalyptic number.

It is an amenable number.

239388057 is a deficient number, since it is larger than the sum of its proper divisors (106394705).

239388057 is a wasteful number, since it uses less digits than its factorization.

239388057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26598679 (or 26598676 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 239388057 is about 15472.1704036635. The cubic root of 239388057 is about 620.9178713142.

The spelling of 239388057 in words is "two hundred thirty-nine million, three hundred eighty-eight thousand, fifty-seven".