442439328 has 24 divisors (see below), whose sum is σ = 1161403488. Its totient is φ = 147479744.

The previous prime is 442439311. The next prime is 442439383. The reversal of 442439328 is 823934244.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×442439328² = 391505117922183168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2304276 + ... + 2304467.

It is an arithmetic number, because the mean of its divisors is an integer number (48391812).

Almost surely, 2^442439328 is an apocalyptic number.

442439328 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

442439328 is an abundant number, since it is smaller than the sum of its proper divisors (718964160).

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

442439328 is a wasteful number, since it uses less digits than its factorization.

442439328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608756 (or 4608748 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 442439328 is about 21034.2417976023. The cubic root of 442439328 is about 761.9934554863.

The spelling of 442439328 in words is "four hundred forty-two million, four hundred thirty-nine thousand, three hundred twenty-eight".