3860391 has 4 divisors (see below), whose sum is σ = 5147192. Its totient is φ = 2573592.

The previous prime is 3860387. The next prime is 3860431. The reversal of 3860391 is 1930683.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3860391 - 2² = 3860387 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3860291) 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, 643396 + ... + 643401.

It is an arithmetic number, because the mean of its divisors is an integer number (1286798).

Almost surely, 2^3860391 is an apocalyptic number.

3860391 is a deficient number, since it is larger than the sum of its proper divisors (1286801).

3860391 is a wasteful number, since it uses less digits than its factorization.

3860391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286800.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 3860391 is about 1964.7877747991. The cubic root of 3860391 is about 156.8713972496.

The spelling of 3860391 in words is "three million, eight hundred sixty thousand, three hundred ninety-one".