431445144 has 64 divisors (see below), whose sum is σ = 1188633600. Its totient is φ = 129661056.

The previous prime is 431445139. The next prime is 431445163. The reversal of 431445144 is 441544134.

It is a super-2 number, since 2×431445144² = 372289824562361472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2664 + ... + 29495.

It is an arithmetic number, because the mean of its divisors is an integer number (18572400).

Almost surely, 2^431445144 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 431445144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (594316800).

431445144 is an abundant number, since it is smaller than the sum of its proper divisors (757188456).

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

431445144 is a wasteful number, since it uses less digits than its factorization.

431445144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32224 (or 32220 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 431445144 is about 20771.2576412696. The cubic root of 431445144 is about 755.6288455562.

Adding to 431445144 its reverse (441544134), we get a palindrome (872989278).

The spelling of 431445144 in words is "four hundred thirty-one million, four hundred forty-five thousand, one hundred forty-four".