3860991 has 12 divisors (see below), whose sum is σ = 5595720. Its totient is φ = 2565360.

The previous prime is 3860959. The next prime is 3860993. The reversal of 3860991 is 1990683.

It is not a de Polignac number, because 3860991 - 2⁵ = 3860959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3860993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3280 + ... + 4298.

It is an arithmetic number, because the mean of its divisors is an integer number (466310).

Almost surely, 2^3860991 is an apocalyptic number.

3860991 is a deficient number, since it is larger than the sum of its proper divisors (1734729).

3860991 is a wasteful number, since it uses less digits than its factorization.

3860991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446 (or 1443 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 3860991 is about 1964.9404571131. The cubic root of 3860991 is about 156.8795240570.

It can be divided in two parts, 3860 and 991, that added together give a triangular number (4851 = T₉₈).

The spelling of 3860991 in words is "three million, eight hundred sixty thousand, nine hundred ninety-one".