442870239 has 32 divisors (see below), whose sum is σ = 687246336. Its totient is φ = 248451840.

The previous prime is 442870231. The next prime is 442870243. The reversal of 442870239 is 932078244.

It is not a de Polignac number, because 442870239 - 2³ = 442870231 is a prime.

It is a super-2 number, since 2×442870239² = 392268097183834242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 442870197 and 442870206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442870231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472179 + ... + 473115.

It is an arithmetic number, because the mean of its divisors is an integer number (21476448).

Almost surely, 2^442870239 is an apocalyptic number.

442870239 is a deficient number, since it is larger than the sum of its proper divisors (244376097).

442870239 is a wasteful number, since it uses less digits than its factorization.

442870239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 442870239 is about 21044.4823885027. The cubic root of 442870239 is about 762.2407547958.

The spelling of 442870239 in words is "four hundred forty-two million, eight hundred seventy thousand, two hundred thirty-nine".