242388657 has 12 divisors (see below), whose sum is σ = 400133760. Its totient is φ = 138507768.

The previous prime is 242388613. The next prime is 242388667. The reversal of 242388657 is 756883242.

It is not a de Polignac number, because 242388657 - 2⁶ = 242388593 is a prime.

It is a super-2 number, since 2×242388657² = 117504522084527298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (242388667) 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, 1923657 + ... + 1923782.

It is an arithmetic number, because the mean of its divisors is an integer number (33344480).

Almost surely, 2^242388657 is an apocalyptic number.

It is an amenable number.

242388657 is a deficient number, since it is larger than the sum of its proper divisors (157745103).

242388657 is a wasteful number, since it uses less digits than its factorization.

242388657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847452 (or 3847449 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 242388657 is about 15568.8360836641. The cubic root of 242388657 is about 623.5013968805.

The spelling of 242388657 in words is "two hundred forty-two million, three hundred eighty-eight thousand, six hundred fifty-seven".