431423020 has 48 divisors (see below), whose sum is σ = 1046122560. Its totient is φ = 146386944.

The previous prime is 431423009. The next prime is 431423023. The reversal of 431423020 is 20324134.

It is a super-2 number, since 2×431423020² = 372251644371840800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (431423023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2305 + ... + 29464.

It is an arithmetic number, because the mean of its divisors is an integer number (21794220).

Almost surely, 2^431423020 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 431423020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523061280).

431423020 is an abundant number, since it is smaller than the sum of its proper divisors (614699540).

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

431423020 is a wasteful number, since it uses less digits than its factorization.

431423020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31882 (or 31880 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 431423020 is about 20770.7250716002. The cubic root of 431423020 is about 755.6159294156.

Adding to 431423020 its reverse (20324134), we get a palindrome (451747154).

The spelling of 431423020 in words is "four hundred thirty-one million, four hundred twenty-three thousand, twenty".