431840 has 24 divisors (see below), whose sum is σ = 1020600. Its totient is φ = 172672.

The previous prime is 431833. The next prime is 431857. The reversal of 431840 is 48134.

431840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 431840.

It is an unprimeable number.

431840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190 + ... + 1509.

It is an arithmetic number, because the mean of its divisors is an integer number (42525).

2⁴³¹⁸⁴⁰ is an apocalyptic number.

431840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431840 is an abundant number, since it is smaller than the sum of its proper divisors (588760).

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

431840 is a wasteful number, since it uses less digits than its factorization.

431840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714 (or 2706 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 431840 is about 657.1453416102. The cubic root of 431840 is about 75.5859290927.

Adding to 431840 its reverse (48134), we get a palindrome (479974).

The spelling of 431840 in words is "four hundred thirty-one thousand, eight hundred forty".