4399920 has 200 divisors, whose sum is σ = 17644704. Its totient is φ = 995328.

The previous prime is 4399907. The next prime is 4399931. The reversal of 4399920 is 299934.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 45312 + ... + 45408.

Almost surely, 2^4399920 is an apocalyptic number.

4399920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4399920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8822352).

4399920 is an abundant number, since it is smaller than the sum of its proper divisors (13244784).

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

4399920 is a wasteful number, since it uses less digits than its factorization.

4399920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 4399920 is about 2097.5986270018. The cubic root of 4399920 is about 163.8632609974.

The spelling of 4399920 in words is "four million, three hundred ninety-nine thousand, nine hundred twenty".