442860990 has 64 divisors (see below), whose sum is σ = 1248694272. Its totient is φ = 99100800.

The previous prime is 442860989. The next prime is 442860991. The reversal of 442860990 is 99068244.

It is an interprime number because it is at equal distance from previous prime (442860989) and next prime (442860991).

It is a super-2 number, since 2×442860990² = 392251712927560200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442860991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47326 + ... + 55905.

It is an arithmetic number, because the mean of its divisors is an integer number (19510848).

Almost surely, 2^442860990 is an apocalyptic number.

442860990 is an abundant number, since it is smaller than the sum of its proper divisors (805833282).

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

442860990 is a wasteful number, since it uses less digits than its factorization.

442860990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103265.

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

The square root of 442860990 is about 21044.2626385436. The cubic root of 442860990 is about 762.2354484907.

The spelling of 442860990 in words is "four hundred forty-two million, eight hundred sixty thousand, nine hundred ninety".