3998992 has 20 divisors (see below), whose sum is σ = 7822540. Its totient is φ = 1980288.

The previous prime is 3998983. The next prime is 3998993. The reversal of 3998992 is 2998993.

3998992 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1971216 + 2027776 = 1404^2 + 1424^2 .

It is not an unprimeable number, because it can be changed into a prime (3998993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598 + ... + 2890.

It is an arithmetic number, because the mean of its divisors is an integer number (391127).

Almost surely, 2^3998992 is an apocalyptic number.

It is an amenable number.

3998992 is a deficient number, since it is larger than the sum of its proper divisors (3823548).

3998992 is a wasteful number, since it uses less digits than its factorization.

3998992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410 (or 2404 counting only the distinct ones).

The product of its digits is 314928, while the sum is 49.

The square root of 3998992 is about 1999.7479841220. The cubic root of 3998992 is about 158.7267699078.

Subtracting from 3998992 its reverse (2998993), we obtain a palindrome (999999).

The spelling of 3998992 in words is "three million, nine hundred ninety-eight thousand, nine hundred ninety-two".