431344540 has 48 divisors (see below), whose sum is σ = 1020063744. Its totient is φ = 151790400.

The previous prime is 431344531. The next prime is 431344549. The reversal of 431344540 is 45443134.

It is an interprime number because it is at equal distance from previous prime (431344531) and next prime (431344549).

It is a super-2 number, since 2×431344540² = 372116224375623200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 431344499 and 431344508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431344549) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 24804 + ... + 38443.

It is an arithmetic number, because the mean of its divisors is an integer number (21251328).

Almost surely, 2^431344540 is an apocalyptic number.

It is an amenable number.

431344540 is an abundant number, since it is smaller than the sum of its proper divisors (588719204).

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

431344540 is a wasteful number, since it uses less digits than its factorization.

431344540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63298 (or 63296 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 431344540 is about 20768.8357882670. The cubic root of 431344540 is about 755.5701087002.

Adding to 431344540 its reverse (45443134), we get a palindrome (476787674).

It can be divided in two parts, 43134 and 4540, that added together give a palindrome (47674).

The spelling of 431344540 in words is "four hundred thirty-one million, three hundred forty-four thousand, five hundred forty".