431987904 has 196 divisors, whose sum is σ = 1319259744. Its totient is φ = 140216832.

The previous prime is 431987891. The next prime is 431987917. The reversal of 431987904 is 409789134.

It is an interprime number because it is at equal distance from previous prime (431987891) and next prime (431987917).

It is a super-2 number, since 2×431987904² = 373227098404626432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 431987904.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2192734 + ... + 2192930.

Almost surely, 2^431987904 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 431987904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659629872).

431987904 is an abundant number, since it is smaller than the sum of its proper divisors (887271840).

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

431987904 is an equidigital number, since it uses as much as digits as its factorization.

431987904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 431987904 is about 20784.3187042539. The cubic root of 431987904 is about 755.9455743132.

The spelling of 431987904 in words is "four hundred thirty-one million, nine hundred eighty-seven thousand, nine hundred four".