442146399 has 8 divisors (see below), whose sum is σ = 589628160. Its totient is φ = 294714456.

The previous prime is 442146391. The next prime is 442146403. The reversal of 442146399 is 993641244.

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

It is not a de Polignac number, because 442146399 - 2³ = 442146391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442146399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442146391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21424 + ... + 36650.

It is an arithmetic number, because the mean of its divisors is an integer number (73703520).

Almost surely, 2^442146399 is an apocalyptic number.

442146399 is a deficient number, since it is larger than the sum of its proper divisors (147481761).

442146399 is a wasteful number, since it uses less digits than its factorization.

442146399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24909.

The product of its digits is 186624, while the sum is 42.

The square root of 442146399 is about 21027.2774985256. The cubic root of 442146399 is about 761.8252521902.

The spelling of 442146399 in words is "four hundred forty-two million, one hundred forty-six thousand, three hundred ninety-nine".