442381432 has 8 divisors (see below), whose sum is σ = 829465200. Its totient is φ = 221190712.

The previous prime is 442381421. The next prime is 442381441. The reversal of 442381432 is 234183244.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 442381394 and 442381403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27648832 + ... + 27648847.

It is an arithmetic number, because the mean of its divisors is an integer number (103683150).

Almost surely, 2^442381432 is an apocalyptic number.

It is an amenable number.

442381432 is a deficient number, since it is larger than the sum of its proper divisors (387083768).

442381432 is a wasteful number, since it uses less digits than its factorization.

442381432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55297685 (or 55297681 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The square root of 442381432 is about 21032.8655204183. The cubic root of 442381432 is about 761.9602168064.

The spelling of 442381432 in words is "four hundred forty-two million, three hundred eighty-one thousand, four hundred thirty-two".