431388648 has 96 divisors (see below), whose sum is σ = 1197050400. Its totient is φ = 140302464.

The previous prime is 431388641. The next prime is 431388689. The reversal of 431388648 is 846883134.

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

It is not an unprimeable number, because it can be changed into a prime (431388641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 734611 + ... + 735197.

It is an arithmetic number, because the mean of its divisors is an integer number (12469275).

Almost surely, 2^431388648 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 431388648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598525200).

431388648 is an abundant number, since it is smaller than the sum of its proper divisors (765661752).

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

431388648 is a wasteful number, since it uses less digits than its factorization.

431388648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 824 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 431388648 is about 20769.8976405759. The cubic root of 431388648 is about 755.5958619341.

The spelling of 431388648 in words is "four hundred thirty-one million, three hundred eighty-eight thousand, six hundred forty-eight".