431920340 has 24 divisors (see below), whose sum is σ = 907984392. Its totient is φ = 172586880.

The previous prime is 431920327. The next prime is 431920393. The reversal of 431920340 is 43029134.

It can be written as a sum of positive squares in 4 ways, for example, as 74407876 + 357512464 = 8626^2 + 18908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9110 + ... + 30770.

It is an arithmetic number, because the mean of its divisors is an integer number (37832683).

Almost surely, 2^431920340 is an apocalyptic number.

It is an amenable number.

431920340 is an abundant number, since it is smaller than the sum of its proper divisors (476064052).

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

431920340 is a wasteful number, since it uses less digits than its factorization.

431920340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22667 (or 22665 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 431920340 is about 20782.6932807084. The cubic root of 431920340 is about 755.9061616589.

Adding to 431920340 its reverse (43029134), we get a palindrome (474949474).

The spelling of 431920340 in words is "four hundred thirty-one million, nine hundred twenty thousand, three hundred forty".