431042440 has 32 divisors (see below), whose sum is σ = 970678080. Its totient is φ = 172268992.

The previous prime is 431042431. The next prime is 431042441. The reversal of 431042440 is 44240134.

It is not an unprimeable number, because it can be changed into a prime (431042441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50739 + ... + 58621.

It is an arithmetic number, because the mean of its divisors is an integer number (30333690).

Almost surely, 2^431042440 is an apocalyptic number.

431042440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431042440 is an abundant number, since it is smaller than the sum of its proper divisors (539635640).

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

431042440 is a wasteful number, since it uses less digits than its factorization.

431042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9261 (or 9257 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 431042440 is about 20761.5615982999. The cubic root of 431042440 is about 755.3936750781.

Adding to 431042440 its reverse (44240134), we get a palindrome (475282574).

The spelling of 431042440 in words is "four hundred thirty-one million, forty-two thousand, four hundred forty".