442887444 has 36 divisors (see below), whose sum is σ = 1145560416. Its totient is φ = 144195408.

The previous prime is 442887437. The next prime is 442887457. The reversal of 442887444 is 444788244.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×442887444² = 392298576105706272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 442887444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141504 + ... + 144599.

Almost surely, 2^442887444 is an apocalyptic number.

It is an amenable number.

442887444 is an abundant number, since it is smaller than the sum of its proper divisors (702672972).

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

442887444 is a wasteful number, since it uses less digits than its factorization.

442887444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286156 (or 286151 counting only the distinct ones).

The product of its digits is 917504, while the sum is 45.

The square root of 442887444 is about 21044.8911615147. The cubic root of 442887444 is about 762.2506253938.

The spelling of 442887444 in words is "four hundred forty-two million, eight hundred eighty-seven thousand, four hundred forty-four".