442664520 has 32 divisors (see below), whose sum is σ = 1327993920. Its totient is φ = 118043840.

The previous prime is 442664507. The next prime is 442664539. The reversal of 442664520 is 25466244.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844316 + ... + 1844555.

It is an arithmetic number, because the mean of its divisors is an integer number (41499810).

Almost surely, 2^442664520 is an apocalyptic number.

442664520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

442664520 is an abundant number, since it is smaller than the sum of its proper divisors (885329400).

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

442664520 is a wasteful number, since it uses less digits than its factorization.

442664520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3688885 (or 3688881 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 442664520 is about 21039.5941025487. The cubic root of 442664520 is about 762.1227129271.

The spelling of 442664520 in words is "four hundred forty-two million, six hundred sixty-four thousand, five hundred twenty".