442402401 has 16 divisors (see below), whose sum is σ = 703448064. Its totient is φ = 241809744.

The previous prime is 442402397. The next prime is 442402409. The reversal of 442402401 is 104204244.

It is not a de Polignac number, because 442402401 - 2² = 442402397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (442402409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457491 + ... + 458456.

It is an arithmetic number, because the mean of its divisors is an integer number (43965504).

Almost surely, 2^442402401 is an apocalyptic number.

It is an amenable number.

442402401 is a deficient number, since it is larger than the sum of its proper divisors (261045663).

442402401 is a wasteful number, since it uses less digits than its factorization.

442402401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915980.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 442402401 is about 21033.3639962798. The cubic root of 442402401 is about 761.9722556566.

Adding to 442402401 its reverse (104204244), we get a palindrome (546606645).

The spelling of 442402401 in words is "four hundred forty-two million, four hundred two thousand, four hundred one".