442399625 has 16 divisors (see below), whose sum is σ = 555843600. Its totient is φ = 351529600.

The previous prime is 442399597. The next prime is 442399679. The reversal of 442399625 is 526993244.

It can be written as a sum of positive squares in 8 ways, for example, as 189557824 + 252841801 = 13768^2 + 15901^2 .

It is not a de Polignac number, because 442399625 - 2⁶ = 442399561 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6749 + ... + 30501.

It is an arithmetic number, because the mean of its divisors is an integer number (34740225).

Almost surely, 2^442399625 is an apocalyptic number.

It is an amenable number.

442399625 is a deficient number, since it is larger than the sum of its proper divisors (113443975).

442399625 is a wasteful number, since it uses less digits than its factorization.

442399625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23917 (or 23907 counting only the distinct ones).

The product of its digits is 466560, while the sum is 44.

The square root of 442399625 is about 21033.2980057812. The cubic root of 442399625 is about 761.9706619044.

The spelling of 442399625 in words is "four hundred forty-two million, three hundred ninety-nine thousand, six hundred twenty-five".