338397657 has 24 divisors (see below), whose sum is σ = 514303200. Its totient is φ = 197278848.

The previous prime is 338397623. The next prime is 338397667. The reversal of 338397657 is 756793833.

It is a happy number.

It is not a de Polignac number, because 338397657 - 2¹⁹ = 337873369 is a prime.

It is a super-2 number, since 2×338397657² = 229025948526179298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (338397667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7932 + ... + 27197.

It is an arithmetic number, because the mean of its divisors is an integer number (21429300).

Almost surely, 2^338397657 is an apocalyptic number.

It is an amenable number.

338397657 is a deficient number, since it is larger than the sum of its proper divisors (175905543).

338397657 is a wasteful number, since it uses less digits than its factorization.

338397657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35177 (or 35164 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 51.

The square root of 338397657 is about 18395.5879764687. The cubic root of 338397657 is about 696.8550459595.

The spelling of 338397657 in words is "three hundred thirty-eight million, three hundred ninety-seven thousand, six hundred fifty-seven".