431022440 has 16 divisors (see below), whose sum is σ = 969800580. Its totient is φ = 172408960.

The previous prime is 431022439. The next prime is 431022451. The reversal of 431022440 is 44220134.

It can be written as a sum of positive squares in 2 ways, for example, as 397683364 + 33339076 = 19942^2 + 5774^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5387741 + ... + 5387820.

Almost surely, 2^431022440 is an apocalyptic number.

431022440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431022440 is an abundant number, since it is smaller than the sum of its proper divisors (538778140).

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

431022440 is a wasteful number, since it uses less digits than its factorization.

431022440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10775572 (or 10775568 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 431022440 is about 20761.0799333753. The cubic root of 431022440 is about 755.3819916909.

Adding to 431022440 its reverse (44220134), we get a palindrome (475242574).

The spelling of 431022440 in words is "four hundred thirty-one million, twenty-two thousand, four hundred forty".