442455220 has 24 divisors (see below), whose sum is σ = 931833000. Its totient is φ = 176472192.

The previous prime is 442455199. The next prime is 442455239. The reversal of 442455220 is 22554244.

It can be written as a sum of positive squares in 4 ways, for example, as 142611364 + 299843856 = 11942^2 + 17316^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24715 + ... + 38674.

It is an arithmetic number, because the mean of its divisors is an integer number (38826375).

Almost surely, 2^442455220 is an apocalyptic number.

It is an amenable number.

442455220 is an abundant number, since it is smaller than the sum of its proper divisors (489377780).

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

442455220 is a wasteful number, since it uses less digits than its factorization.

442455220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63747 (or 63745 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 442455220 is about 21034.6195591934. The cubic root of 442455220 is about 762.0025787372.

The spelling of 442455220 in words is "four hundred forty-two million, four hundred fifty-five thousand, two hundred twenty".