3992139 has 16 divisors (see below), whose sum is σ = 5952000. Its totient is φ = 2644488.

The previous prime is 3992123. The next prime is 3992141. The reversal of 3992139 is 9312993.

It is not a de Polignac number, because 3992139 - 2⁴ = 3992123 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3992159) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5002 + ... + 5744.

It is an arithmetic number, because the mean of its divisors is an integer number (372000).

Almost surely, 2^3992139 is an apocalyptic number.

3992139 is a deficient number, since it is larger than the sum of its proper divisors (1959861).

3992139 is a wasteful number, since it uses less digits than its factorization.

3992139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951 (or 945 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 3992139 is about 1998.0337834982. The cubic root of 3992139 is about 158.6360490043.

The spelling of 3992139 in words is "three million, nine hundred ninety-two thousand, one hundred thirty-nine".