442440431 has 8 divisors (see below), whose sum is σ = 444896400. Its totient is φ = 439992000.

The previous prime is 442440421. The next prime is 442440433. The reversal of 442440431 is 134044244.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442440431 is a prime.

It is a super-2 number, since 2×442440431² = 391507069966931522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442440431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442440433) 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 7 ways as a sum of consecutive naturals, for example, 145931 + ... + 148931.

It is an arithmetic number, because the mean of its divisors is an integer number (55612050).

Almost surely, 2^442440431 is an apocalyptic number.

442440431 is a deficient number, since it is larger than the sum of its proper divisors (2455969).

442440431 is a wasteful number, since it uses less digits than its factorization.

442440431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 442440431 is about 21034.2680167388. The cubic root of 442440431 is about 761.9940887016.

Adding to 442440431 its reverse (134044244), we get a palindrome (576484675).

The spelling of 442440431 in words is "four hundred forty-two million, four hundred forty thousand, four hundred thirty-one".