440431 has 2 divisors, whose sum is σ = 440432. Its totient is φ = 440430.

The previous prime is 440399. The next prime is 440441. The reversal of 440431 is 134044.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 440431 - 2⁵ = 440399 is a prime.

It is a super-2 number, since 2×440431² = 387958931522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220215 + 220216.

It is an arithmetic number, because the mean of its divisors is an integer number (220216).

2⁴⁴⁰⁴³¹ is an apocalyptic number.

440431 is a deficient number, since it is larger than the sum of its proper divisors (1).

440431 is an equidigital number, since it uses as much as digits as its factorization.

440431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 440431 is about 663.6497570255. The cubic root of 440431 is about 76.0838755428.

Adding to 440431 its reverse (134044), we get a palindrome (574475).

It can be divided in two parts, 44043 and 1, that added together give a palindrome (44044).

The spelling of 440431 in words is "four hundred forty thousand, four hundred thirty-one".