431660 has 24 divisors (see below), whose sum is σ = 919296. Its totient is φ = 170240.

The previous prime is 431659. The next prime is 431663. The reversal of 431660 is 66134.

431660 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 not an unprimeable number, because it can be changed into a prime (431663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2165 + ... + 2355.

It is an arithmetic number, because the mean of its divisors is an integer number (38304).

2⁴³¹⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

431660 is an abundant number, since it is smaller than the sum of its proper divisors (487636).

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

431660 is a wasteful number, since it uses less digits than its factorization.

431660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 431660 is about 657.0083713318. The cubic root of 431660 is about 75.5754256980.

Adding to 431660 its reverse (66134), we get a palindrome (497794).

The spelling of 431660 in words is "four hundred thirty-one thousand, six hundred sixty".