442668280 has 16 divisors (see below), whose sum is σ = 996003720. Its totient is φ = 177067296.

The previous prime is 442668269. The next prime is 442668319. The reversal of 442668280 is 82866244.

It is a super-2 number, since 2×442668280² = 391910412236316800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 11066707 = 442668280 / (4 + 4 + 2 + 6 + 6 + 8 + 2 + 8 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5533314 + ... + 5533393.

Almost surely, 2^442668280 is an apocalyptic number.

442668280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

442668280 is an abundant number, since it is smaller than the sum of its proper divisors (553335440).

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

442668280 is a wasteful number, since it uses less digits than its factorization.

442668280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11066718 (or 11066714 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 442668280 is about 21039.6834576949. The cubic root of 442668280 is about 762.1248707488.

The spelling of 442668280 in words is "four hundred forty-two million, six hundred sixty-eight thousand, two hundred eighty".