4399431 has 16 divisors (see below), whose sum is σ = 6259200. Its totient is φ = 2740608.

The previous prime is 4399399. The next prime is 4399457. The reversal of 4399431 is 1349934.

It is not a de Polignac number, because 4399431 - 2⁵ = 4399399 is a prime.

It is a super-2 number, since 2×4399431² = 38709986247522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4399392 and 4399401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4399471) 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, 4015 + ... + 4991.

It is an arithmetic number, because the mean of its divisors is an integer number (391200).

Almost surely, 2^4399431 is an apocalyptic number.

4399431 is a deficient number, since it is larger than the sum of its proper divisors (1859769).

4399431 is a wasteful number, since it uses less digits than its factorization.

4399431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078.

The product of its digits is 11664, while the sum is 33.

The square root of 4399431 is about 2097.4820619018. The cubic root of 4399431 is about 163.8571902732.

It can be divided in two parts, 439 and 9431, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 4399431 in words is "four million, three hundred ninety-nine thousand, four hundred thirty-one".