431212340 has 24 divisors (see below), whose sum is σ = 975203880. Its totient is φ = 159216768.

The previous prime is 431212283. The next prime is 431212363. The reversal of 431212340 is 43212134.

It can be written as a sum of positive squares in 4 ways, for example, as 68644 + 431143696 = 262^2 + 20764^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 828995 + ... + 829514.

It is an arithmetic number, because the mean of its divisors is an integer number (40633495).

Almost surely, 2^431212340 is an apocalyptic number.

It is an amenable number.

431212340 is an abundant number, since it is smaller than the sum of its proper divisors (543991540).

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

431212340 is a wasteful number, since it uses less digits than its factorization.

431212340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658531 (or 1658529 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 431212340 is about 20765.6528912529. The cubic root of 431212340 is about 755.4929108801.

Adding to 431212340 its reverse (43212134), we get a palindrome (474424474).

The spelling of 431212340 in words is "four hundred thirty-one million, two hundred twelve thousand, three hundred forty".