442804621 has 12 divisors (see below), whose sum is σ = 517268160. Its totient is φ = 377948760.

The previous prime is 442804619. The next prime is 442804643. The reversal of 442804621 is 126408244.

It is not a de Polignac number, because 442804621 - 2¹ = 442804619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442804121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7195 + ... + 30616.

It is an arithmetic number, because the mean of its divisors is an integer number (43105680).

Almost surely, 2^442804621 is an apocalyptic number.

It is an amenable number.

442804621 is a deficient number, since it is larger than the sum of its proper divisors (74463539).

442804621 is a wasteful number, since it uses less digits than its factorization.

442804621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38064 (or 38057 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 442804621 is about 21042.9232997699. The cubic root of 442804621 is about 762.2031070607.

The spelling of 442804621 in words is "four hundred forty-two million, eight hundred four thousand, six hundred twenty-one".