3931642 has 32 divisors (see below), whose sum is σ = 7076160. Its totient is φ = 1614720.

The previous prime is 3931639. The next prime is 3931649. The reversal of 3931642 is 2461393.

It is a self number, because there is not a number n which added to its sum of digits gives 3931642.

It is not an unprimeable number, because it can be changed into a prime (3931649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16758 + ... + 16990.

It is an arithmetic number, because the mean of its divisors is an integer number (221130).

Almost surely, 2^3931642 is an apocalyptic number.

3931642 is a deficient number, since it is larger than the sum of its proper divisors (3144518).

3931642 is a wasteful number, since it uses less digits than its factorization.

3931642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318.

The product of its digits is 3888, while the sum is 28.

The square root of 3931642 is about 1982.8368566274. The cubic root of 3931642 is about 157.8306415833.

The spelling of 3931642 in words is "three million, nine hundred thirty-one thousand, six hundred forty-two".