442367988 has 12 divisors (see below), whose sum is σ = 1032192000. Its totient is φ = 147455992.

The previous prime is 442367987. The next prime is 442368029. The reversal of 442367988 is 889763244.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 442367988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442367987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18431988 + ... + 18432011.

It is an arithmetic number, because the mean of its divisors is an integer number (86016000).

Almost surely, 2^442367988 is an apocalyptic number.

It is an amenable number.

442367988 is an abundant number, since it is smaller than the sum of its proper divisors (589824012).

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

442367988 is a wasteful number, since it uses less digits than its factorization.

442367988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36864006 (or 36864004 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 51.

The square root of 442367988 is about 21032.5459229262. The cubic root of 442367988 is about 761.9524980550.

The spelling of 442367988 in words is "four hundred forty-two million, three hundred sixty-seven thousand, nine hundred eighty-eight".