4431018 has 16 divisors (see below), whose sum is σ = 9012960. Its totient is φ = 1451856.

The previous prime is 4431017. The next prime is 4431023. The reversal of 4431018 is 8101344.

It is a junction number, because it is equal to n+sod(n) for n = 4430985 and 4431003.

It is not an unprimeable number, because it can be changed into a prime (4431017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5905 + ... + 6612.

It is an arithmetic number, because the mean of its divisors is an integer number (563310).

Almost surely, 2^4431018 is an apocalyptic number.

4431018 is an abundant number, since it is smaller than the sum of its proper divisors (4581942).

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

4431018 is a wasteful number, since it uses less digits than its factorization.

4431018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12581.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 4431018 is about 2104.9983372915. The cubic root of 4431018 is about 164.2484089928.

The spelling of 4431018 in words is "four million, four hundred thirty-one thousand, eighteen".