431623164 has 108 divisors (see below), whose sum is σ = 1202448744. Its totient is φ = 120149568.

The previous prime is 431623163. The next prime is 431623169. The reversal of 431623164 is 461326134.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431623163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1087014 + ... + 1087410.

Almost surely, 2^431623164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 431623164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (601224372).

431623164 is an abundant number, since it is smaller than the sum of its proper divisors (770825580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431623164 is a wasteful number, since it uses less digits than its factorization.

431623164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 452 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 431623164 is about 20775.5424477918. The cubic root of 431623164 is about 755.7327587666.

Adding to 431623164 its reverse (461326134), we get a palindrome (892949298).

The spelling of 431623164 in words is "four hundred thirty-one million, six hundred twenty-three thousand, one hundred sixty-four".