442400431 has 8 divisors (see below), whose sum is σ = 482770944. Its totient is φ = 402055320.

The previous prime is 442400369. The next prime is 442400437. The reversal of 442400431 is 134004244.

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-442400431 is a prime.

It is a super-2 number, since 2×442400431² = 391436282697971522, which contains 22 as substring.

It is a Duffinian number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64300 + ... + 70846.

It is an arithmetic number, because the mean of its divisors is an integer number (60346368).

Almost surely, 2^442400431 is an apocalyptic number.

442400431 is a deficient number, since it is larger than the sum of its proper divisors (40370513).

442400431 is a wasteful number, since it uses less digits than its factorization.

442400431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12701.

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

The square root of 442400431 is about 21033.3171658681. The cubic root of 442400431 is about 761.9711246444.

Adding to 442400431 its reverse (134004244), we get a palindrome (576404675).

The spelling of 442400431 in words is "four hundred forty-two million, four hundred thousand, four hundred thirty-one".