3985731 has 12 divisors (see below), whose sum is σ = 5956080. Its totient is φ = 2565360.

The previous prime is 3985721. The next prime is 3985777. The reversal of 3985731 is 1375893.

3985731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-3985731 is a prime.

It is a super-2 number, since 2×3985731² = 31772103208722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3985711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7375 + ... + 7896.

It is an arithmetic number, because the mean of its divisors is an integer number (496340).

Almost surely, 2^3985731 is an apocalyptic number.

3985731 is a deficient number, since it is larger than the sum of its proper divisors (1970349).

3985731 is a wasteful number, since it uses less digits than its factorization.

3985731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15306 (or 15303 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 3985731 is about 1996.4295629949. The cubic root of 3985731 is about 158.5511250919.

The spelling of 3985731 in words is "three million, nine hundred eighty-five thousand, seven hundred thirty-one".