442888638 has 32 divisors (see below), whose sum is σ = 919416960. Its totient is φ = 142057440.

The previous prime is 442888619. The next prime is 442888657. The reversal of 442888638 is 836888244.

It is an interprime number because it is at equal distance from previous prime (442888619) and next prime (442888657).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49273 + ... + 57563.

It is an arithmetic number, because the mean of its divisors is an integer number (28731780).

Almost surely, 2^442888638 is an apocalyptic number.

442888638 is an abundant number, since it is smaller than the sum of its proper divisors (476528322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442888638 is a wasteful number, since it uses less digits than its factorization.

442888638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8632.

The product of its digits is 2359296, while the sum is 51.

The square root of 442888638 is about 21044.9195294256. The cubic root of 442888638 is about 762.2513103884.

The spelling of 442888638 in words is "four hundred forty-two million, eight hundred eighty-eight thousand, six hundred thirty-eight".