4399988 has 6 divisors (see below), whose sum is σ = 7699986. Its totient is φ = 2199992.

The previous prime is 4399987. The next prime is 4400021. The reversal of 4399988 is 8899934.

It can be written as a sum of positive squares in only one way, i.e., 3794704 + 605284 = 1948^2 + 778^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4399987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549995 + ... + 550002.

It is an arithmetic number, because the mean of its divisors is an integer number (1283331).

Almost surely, 2^4399988 is an apocalyptic number.

It is an amenable number.

4399988 is a deficient number, since it is larger than the sum of its proper divisors (3299998).

4399988 is a wasteful number, since it uses less digits than its factorization.

4399988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100001 (or 1099999 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 4399988 is about 2097.6148359506. The cubic root of 4399988 is about 163.8641051525.

The spelling of 4399988 in words is "four million, three hundred ninety-nine thousand, nine hundred eighty-eight".