4399240 has 32 divisors (see below), whose sum is σ = 9999000. Its totient is φ = 1741824.

The previous prime is 4399237. The next prime is 4399289. The reversal of 4399240 is 429934.

It can be written as a sum of positive squares in 4 ways, for example, as 3526884 + 872356 = 1878^2 + 934^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3856 + ... + 4864.

Almost surely, 2^4399240 is an apocalyptic number.

4399240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4399240 is an abundant number, since it is smaller than the sum of its proper divisors (5599760).

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

4399240 is a wasteful number, since it uses less digits than its factorization.

4399240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 4399240 is about 2097.4365306249. The cubic root of 4399240 is about 163.8548189683.

The spelling of 4399240 in words is "four million, three hundred ninety-nine thousand, two hundred forty".