442238931 has 6 divisors (see below), whose sum is σ = 638789580. Its totient is φ = 294825948.

The previous prime is 442238899. The next prime is 442238939. The reversal of 442238931 is 139832244.

It is not a de Polignac number, because 442238931 - 2⁵ = 442238899 is a prime.

It is a super-2 number, since 2×442238931² = 391150544184045522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (442238939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24568821 + ... + 24568838.

It is an arithmetic number, because the mean of its divisors is an integer number (106464930).

Almost surely, 2^442238931 is an apocalyptic number.

442238931 is a deficient number, since it is larger than the sum of its proper divisors (196550649).

442238931 is a wasteful number, since it uses less digits than its factorization.

442238931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49137665 (or 49137662 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 442238931 is about 21029.4776682637. The cubic root of 442238931 is about 761.8783931841.

The spelling of 442238931 in words is "four hundred forty-two million, two hundred thirty-eight thousand, nine hundred thirty-one".