4399724 has 12 divisors (see below), whose sum is σ = 8799504. Its totient is φ = 1885584.

The previous prime is 4399723. The next prime is 4399729. The reversal of 4399724 is 4279934.

4399724 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4399721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78539 + ... + 78594.

It is an arithmetic number, because the mean of its divisors is an integer number (733292).

Almost surely, 2^4399724 is an apocalyptic number.

It is an amenable number.

4399724 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4399724 is a wasteful number, since it uses less digits than its factorization.

4399724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157144 (or 157142 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 4399724 is about 2097.5519063899. The cubic root of 4399724 is about 163.8608277959.

The spelling of 4399724 in words is "four million, three hundred ninety-nine thousand, seven hundred twenty-four".