3899988 has 30 divisors (see below), whose sum is σ = 10196186. Its totient is φ = 1299888.

The previous prime is 3899983. The next prime is 3899989. The reversal of 3899988 is 8899983.

It can be written as a sum of positive squares in only one way, i.e., 2125764 + 1774224 = 1458^2 + 1332^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3899981) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5695 + ... + 6342.

Almost surely, 2^3899988 is an apocalyptic number.

It is an amenable number.

3899988 is an abundant number, since it is smaller than the sum of its proper divisors (6296198).

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

3899988 is a wasteful number, since it uses less digits than its factorization.

3899988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12053 (or 12042 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 3899988 is about 1974.8387275927. The cubic root of 3899988 is about 157.4059302208.

The spelling of 3899988 in words is "three million, eight hundred ninety-nine thousand, nine hundred eighty-eight".