3993138 has 30 divisors (see below), whose sum is σ = 9004941. Its totient is φ = 1322568.

The previous prime is 3993127. The next prime is 3993161. The reversal of 3993138 is 8313993.

It can be written as a sum of positive squares in 2 ways, for example, as 3814209 + 178929 = 1953^2 + 423^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1413.

Its product of digits (17496) is a multiple of the sum of its prime divisors (162).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 25356 + ... + 25512.

Almost surely, 2^3993138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3993138

3993138 is an abundant number, since it is smaller than the sum of its proper divisors (5011803).

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

3993138 is an equidigital number, since it uses as much as digits as its factorization.

3993138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 162 counting only the distinct ones).

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

The square root of 3993138 is about 1998.2837636332. The cubic root of 3993138 is about 158.6492803568.

The spelling of 3993138 in words is "three million, nine hundred ninety-three thousand, one hundred thirty-eight".