442190988 has 42 divisors (see below), whose sum is σ = 1160228244. Its totient is φ = 147396024.

The previous prime is 442190981. The next prime is 442190999. The reversal of 442190988 is 889091244.

It is a super-2 number, since 2×442190988² = 391065739736832288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (442190981) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 72906 + ... + 78737.

It is an arithmetic number, because the mean of its divisors is an integer number (27624482).

Almost surely, 2^442190988 is an apocalyptic number.

It is an amenable number.

442190988 is an abundant number, since it is smaller than the sum of its proper divisors (718037256).

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

442190988 is a wasteful number, since it uses less digits than its factorization.

442190988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151665 (or 151648 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 442190988 is about 21028.3377374437. The cubic root of 442190988 is about 761.8508605139.

The spelling of 442190988 in words is "four hundred forty-two million, one hundred ninety thousand, nine hundred eighty-eight".