239645457 has 12 divisors (see below), whose sum is σ = 346701264. Its totient is φ = 159511320.

The previous prime is 239645453. The next prime is 239645467. The reversal of 239645457 is 754546932.

It is not a de Polignac number, because 239645457 - 2² = 239645453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (239645453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14919 + ... + 26492.

It is an arithmetic number, because the mean of its divisors is an integer number (28891772).

Almost surely, 2^239645457 is an apocalyptic number.

It is an amenable number.

239645457 is a deficient number, since it is larger than the sum of its proper divisors (107055807).

239645457 is a wasteful number, since it uses less digits than its factorization.

239645457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42060 (or 42057 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The square root of 239645457 is about 15480.4863295699. The cubic root of 239645457 is about 621.1403371757.

The spelling of 239645457 in words is "two hundred thirty-nine million, six hundred forty-five thousand, four hundred fifty-seven".