442400638 has 16 divisors (see below), whose sum is σ = 682180560. Its totient is φ = 215018496.

The previous prime is 442400627. The next prime is 442400663. The reversal of 442400638 is 836004244.

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, 102145 + ... + 106387.

It is an arithmetic number, because the mean of its divisors is an integer number (42636285).

Almost surely, 2^442400638 is an apocalyptic number.

442400638 is a deficient number, since it is larger than the sum of its proper divisors (239779922).

442400638 is a wasteful number, since it uses less digits than its factorization.

442400638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691.

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 442400638 is about 21033.3220866320. The cubic root of 442400638 is about 761.9712434869.

The spelling of 442400638 in words is "four hundred forty-two million, four hundred thousand, six hundred thirty-eight".