442040431 has 8 divisors (see below), whose sum is σ = 508110624. Its totient is φ = 376700640.

The previous prime is 442040429. The next prime is 442040441. The reversal of 442040431 is 134040244.

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

It is a cyclic number.

It is not a de Polignac number, because 442040431 - 2¹ = 442040429 is a prime.

It is a super-2 number, since 2×442040431² = 390799485277331522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442040441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181300 + ... + 183721.

It is an arithmetic number, because the mean of its divisors is an integer number (63513828).

Almost surely, 2^442040431 is an apocalyptic number.

442040431 is a deficient number, since it is larger than the sum of its proper divisors (66070193).

442040431 is a wasteful number, since it uses less digits than its factorization.

442040431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365201.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 442040431 is about 21024.7575729186. The cubic root of 442040431 is about 761.7643858130.

Adding to 442040431 its reverse (134040244), we get a palindrome (576080675).

The spelling of 442040431 in words is "four hundred forty-two million, forty thousand, four hundred thirty-one".