3891688 has 16 divisors (see below), whose sum is σ = 7332480. Its totient is φ = 1936368.

The previous prime is 3891683. The next prime is 3891689. The reversal of 3891688 is 8861983.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3891683) 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, 745 + ... + 2887.

It is an arithmetic number, because the mean of its divisors is an integer number (458280).

Almost surely, 2^3891688 is an apocalyptic number.

It is an amenable number.

3891688 is a deficient number, since it is larger than the sum of its proper divisors (3440792).

3891688 is a wasteful number, since it uses less digits than its factorization.

3891688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376 (or 2372 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 3891688 is about 1972.7361709058. The cubic root of 3891688 is about 157.2941865323.

The spelling of 3891688 in words is "three million, eight hundred ninety-one thousand, six hundred eighty-eight".