4431861 has 32 divisors (see below), whose sum is σ = 7603200. Its totient is φ = 2499120.

The previous prime is 4431857. The next prime is 4431871. The reversal of 4431861 is 1681344.

It is not a de Polignac number, because 4431861 - 2² = 4431857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4431811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24670 + ... + 24848.

It is an arithmetic number, because the mean of its divisors is an integer number (237600).

Almost surely, 2^4431861 is an apocalyptic number.

It is an amenable number.

4431861 is a deficient number, since it is larger than the sum of its proper divisors (3171339).

4431861 is a wasteful number, since it uses less digits than its factorization.

4431861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 320 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 4431861 is about 2105.1985654565. The cubic root of 4431861 is about 164.2588244044.

It can be divided in two parts, 443 and 1861, that added together give a square (2304 = 48²).

The spelling of 4431861 in words is "four million, four hundred thirty-one thousand, eight hundred sixty-one".