442123998 has 32 divisors (see below), whose sum is σ = 945374976. Its totient is φ = 137355648.

The previous prime is 442123991. The next prime is 442123999. The reversal of 442123998 is 899321244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442123991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10536 + ... + 31547.

It is an arithmetic number, because the mean of its divisors is an integer number (29542968).

Almost surely, 2^442123998 is an apocalyptic number.

442123998 is an abundant number, since it is smaller than the sum of its proper divisors (503250978).

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

442123998 is a wasteful number, since it uses less digits than its factorization.

442123998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42208.

The product of its digits is 124416, while the sum is 42.

The square root of 442123998 is about 21026.7448265299. The cubic root of 442123998 is about 761.8123862136.

The spelling of 442123998 in words is "four hundred forty-two million, one hundred twenty-three thousand, nine hundred ninety-eight".