431440423 has 8 divisors (see below), whose sum is σ = 445599360. Its totient is φ = 417296640.

The previous prime is 431440411. The next prime is 431440459. The reversal of 431440423 is 324044134.

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-431440423 is a prime.

It is a super-2 number, since 2×431440423² = 372281677196837858, 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 (431440123) 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, 97311 + ... + 101647.

It is an arithmetic number, because the mean of its divisors is an integer number (55699920).

Almost surely, 2^431440423 is an apocalyptic number.

431440423 is a deficient number, since it is larger than the sum of its proper divisors (14158937).

431440423 is a wasteful number, since it uses less digits than its factorization.

431440423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7577.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 431440423 is about 20771.1439983454. The cubic root of 431440423 is about 755.6260894416.

Adding to 431440423 its reverse (324044134), we get a palindrome (755484557).

The spelling of 431440423 in words is "four hundred thirty-one million, four hundred forty thousand, four hundred twenty-three".