431402344 has 8 divisors (see below), whose sum is σ = 808879410. Its totient is φ = 215701168.

The previous prime is 431402339. The next prime is 431402357. The reversal of 431402344 is 443204134.

It can be written as a sum of positive squares in only one way, i.e., 427248900 + 4153444 = 20670^2 + 2038^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×431402344² = 372215964817388672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26962639 + ... + 26962654.

Almost surely, 2^431402344 is an apocalyptic number.

It is an amenable number.

431402344 is a deficient number, since it is larger than the sum of its proper divisors (377477066).

431402344 is a wasteful number, since it uses less digits than its factorization.

431402344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53925299 (or 53925295 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 431402344 is about 20770.2273458910. The cubic root of 431402344 is about 755.6038582281.

Adding to 431402344 its reverse (443204134), we get a palindrome (874606478).

The spelling of 431402344 in words is "four hundred thirty-one million, four hundred two thousand, three hundred forty-four".