431440340 has 24 divisors (see below), whose sum is σ = 906710112. Its totient is φ = 172445600.

The previous prime is 431440333. The next prime is 431440343. The reversal of 431440340 is 43044134.

It is a super-2 number, since 2×431440340² = 372281533958631200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431440343) 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, 21587 + ... + 36453.

It is an arithmetic number, because the mean of its divisors is an integer number (37779588).

Almost surely, 2^431440340 is an apocalyptic number.

It is an amenable number.

431440340 is an abundant number, since it is smaller than the sum of its proper divisors (475269772).

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

431440340 is a wasteful number, since it uses less digits than its factorization.

431440340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16327 (or 16325 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 431440340 is about 20771.1420003812. The cubic root of 431440340 is about 755.6260409861.

Adding to 431440340 its reverse (43044134), we get a palindrome (474484474).

The spelling of 431440340 in words is "four hundred thirty-one million, four hundred forty thousand, three hundred forty".