431321340 has 24 divisors (see below), whose sum is σ = 1207699920. Its totient is φ = 115019008.

The previous prime is 431321327. The next prime is 431321459. The reversal of 431321340 is 43123134.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3594285 + ... + 3594404.

It is an arithmetic number, because the mean of its divisors is an integer number (50320830).

Almost surely, 2^431321340 is an apocalyptic number.

It is an amenable number.

431321340 is an abundant number, since it is smaller than the sum of its proper divisors (776378580).

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

431321340 is a wasteful number, since it uses less digits than its factorization.

431321340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7188701 (or 7188699 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 431321340 is about 20768.2772516162. The cubic root of 431321340 is about 755.5565622664.

Adding to 431321340 its reverse (43123134), we get a palindrome (474444474).

The spelling of 431321340 in words is "four hundred thirty-one million, three hundred twenty-one thousand, three hundred forty".