4399890 has 64 divisors (see below), whose sum is σ = 11750400. Its totient is φ = 1045440.

The previous prime is 4399883. The next prime is 4399903. The reversal of 4399890 is 989934.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22011 + ... + 22209.

It is an arithmetic number, because the mean of its divisors is an integer number (183600).

Almost surely, 2^4399890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4399890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5875200).

4399890 is an abundant number, since it is smaller than the sum of its proper divisors (7350510).

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

4399890 is a wasteful number, since it uses less digits than its factorization.

4399890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 4399890 is about 2097.5914759552. The cubic root of 4399890 is about 163.8628885733.

The spelling of 4399890 in words is "four million, three hundred ninety-nine thousand, eight hundred ninety".