4399990 has 32 divisors (see below), whose sum is σ = 9123840. Its totient is φ = 1496544.

The previous prime is 4399987. The next prime is 4400021. The reversal of 4399990 is 999934.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16599 + ... + 16861.

It is an arithmetic number, because the mean of its divisors is an integer number (285120).

Almost surely, 2^4399990 is an apocalyptic number.

4399990 is an abundant number, since it is smaller than the sum of its proper divisors (4723850).

4399990 is a wasteful number, since it uses less digits than its factorization.

4399990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 4399990 is about 2097.6153126825. The cubic root of 4399990 is about 163.8641299804.

The spelling of 4399990 in words is "four million, three hundred ninety-nine thousand, nine hundred ninety".