431440242 has 32 divisors (see below), whose sum is σ = 886281792. Its totient is φ = 139938624.

The previous prime is 431440241. The next prime is 431440249. The reversal of 431440242 is 242044134.

It is a happy number.

It is a super-2 number, since 2×431440242² = 372281364834037128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (431440241) 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, 68448 + ... + 74484.

It is an arithmetic number, because the mean of its divisors is an integer number (27696306).

Almost surely, 2^431440242 is an apocalyptic number.

431440242 is an abundant number, since it is smaller than the sum of its proper divisors (454841550).

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

431440242 is a wasteful number, since it uses less digits than its factorization.

431440242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6362.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 431440242 is about 20771.1396413389. The cubic root of 431440242 is about 755.6259837736.

Adding to 431440242 its reverse (242044134), we get a palindrome (673484376).

The spelling of 431440242 in words is "four hundred thirty-one million, four hundred forty thousand, two hundred forty-two".