442400438 has 8 divisors (see below), whose sum is σ = 663869640. Its totient is φ = 221110560.

The previous prime is 442400437. The next prime is 442400447. The reversal of 442400438 is 834004244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 442400438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442400437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38483 + ... + 48638.

It is an arithmetic number, because the mean of its divisors is an integer number (82983705).

Almost surely, 2^442400438 is an apocalyptic number.

442400438 is a deficient number, since it is larger than the sum of its proper divisors (221469202).

442400438 is a wasteful number, since it uses less digits than its factorization.

442400438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89662.

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 442400438 is about 21033.3173322707. The cubic root of 442400438 is about 761.9711286632.

The spelling of 442400438 in words is "four hundred forty-two million, four hundred thousand, four hundred thirty-eight".