4431985 has 16 divisors (see below), whose sum is σ = 5878656. Its totient is φ = 3190528.

The previous prime is 4431961. The next prime is 4431989. The reversal of 4431985 is 5891344.

It is a cyclic number.

It is not a de Polignac number, because 4431985 - 2⁷ = 4431857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4431985.

It is not an unprimeable number, because it can be changed into a prime (4431989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 822 + ... + 3088.

It is an arithmetic number, because the mean of its divisors is an integer number (367416).

Almost surely, 2^4431985 is an apocalyptic number.

It is an amenable number.

4431985 is a deficient number, since it is larger than the sum of its proper divisors (1446671).

4431985 is a wasteful number, since it uses less digits than its factorization.

4431985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312.

The product of its digits is 17280, while the sum is 34.

The square root of 4431985 is about 2105.2280161541. The cubic root of 4431985 is about 164.2603563346.

It can be divided in two parts, 4431 and 985, that multiplied together give a triangular number (4364535 = T₂₉₅₄).

The spelling of 4431985 in words is "four million, four hundred thirty-one thousand, nine hundred eighty-five".