442403140 has 24 divisors (see below), whose sum is σ = 935833752. Its totient is φ = 175668480.

The previous prime is 442403123. The next prime is 442403173. The reversal of 442403140 is 41304244.

It can be written as a sum of positive squares in 4 ways, for example, as 21086464 + 421316676 = 4592^2 + 20526^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77991 + ... + 83470.

It is an arithmetic number, because the mean of its divisors is an integer number (38993073).

Almost surely, 2^442403140 is an apocalyptic number.

It is an amenable number.

442403140 is an abundant number, since it is smaller than the sum of its proper divisors (493430612).

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

442403140 is a wasteful number, since it uses less digits than its factorization.

442403140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161607 (or 161605 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 442403140 is about 21033.3815636003. The cubic root of 442403140 is about 761.9726799288.

Adding to 442403140 its reverse (41304244), we get a palindrome (483707384).

The spelling of 442403140 in words is "four hundred forty-two million, four hundred three thousand, one hundred forty".