431324442 has 48 divisors (see below), whose sum is σ = 1003115880. Its totient is φ = 133456896.

The previous prime is 431324423. The next prime is 431324449. The reversal of 431324442 is 244423134.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 361418121 + 69906321 = 19011^2 + 8361^2 .

It is a super-2 number, since 2×431324442² = 372081548533222728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (431324449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12684 + ... + 31992.

Almost surely, 2^431324442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 431324442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501557940).

431324442 is an abundant number, since it is smaller than the sum of its proper divisors (571791438).

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

431324442 is a wasteful number, since it uses less digits than its factorization.

431324442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19407 (or 19404 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 431324442 is about 20768.3519326884. The cubic root of 431324442 is about 755.5583735461.

Adding to 431324442 its reverse (244423134), we get a palindrome (675747576).

It can be divided in two parts, 43132 and 4442, that added together give a palindrome (47574).

The spelling of 431324442 in words is "four hundred thirty-one million, three hundred twenty-four thousand, four hundred forty-two".