431670988 has 36 divisors (see below), whose sum is σ = 881458032. Its totient is φ = 184973040.

The previous prime is 431670959. The next prime is 431670989. The reversal of 431670988 is 889076134.

It is a happy number.

It is a super-2 number, since 2×431670988² = 372679683761792288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431670989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64018 + ... + 70438.

Almost surely, 2^431670988 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 431670988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440729016).

431670988 is an abundant number, since it is smaller than the sum of its proper divisors (449787044).

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

431670988 is an frugal number, since it uses more digits than its factorization.

431670988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460 (or 6430 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 431670988 is about 20776.6933846558. The cubic root of 431670988 is about 755.7606695553.

The spelling of 431670988 in words is "four hundred thirty-one million, six hundred seventy thousand, nine hundred eighty-eight".