3998900 has 18 divisors (see below), whose sum is σ = 8677830. Its totient is φ = 1599520.

The previous prime is 3998899. The next prime is 3998959. The reversal of 3998900 is 98993.

It can be written as a sum of positive squares in 3 ways, for example, as 14884 + 3984016 = 122^2 + 1996^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19895 + ... + 20094.

Almost surely, 2^3998900 is an apocalyptic number.

It is an amenable number.

3998900 is an abundant number, since it is smaller than the sum of its proper divisors (4678930).

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

3998900 is a wasteful number, since it uses less digits than its factorization.

3998900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40003 (or 39996 counting only the distinct ones).

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

The square root of 3998900 is about 1999.7249810911. The cubic root of 3998900 is about 158.7255526864.

The spelling of 3998900 in words is "three million, nine hundred ninety-eight thousand, nine hundred".