3999800 has 48 divisors (see below), whose sum is σ = 10631760. Its totient is φ = 1370880.

The previous prime is 3999791. The next prime is 3999803. The reversal of 3999800 is 89993.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29 + ... + 2828.

It is an arithmetic number, because the mean of its divisors is an integer number (221495).

Almost surely, 2^3999800 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3999800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5315880).

3999800 is an abundant number, since it is smaller than the sum of its proper divisors (6631960).

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

3999800 is a wasteful number, since it uses less digits than its factorization.

3999800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880 (or 2871 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 3999800 is about 1999.9499993750. The cubic root of 3999800 is about 158.7374594843.

The spelling of 3999800 in words is "three million, nine hundred ninety-nine thousand, eight hundred".