3865899 has 8 divisors (see below), whose sum is σ = 5204992. Its totient is φ = 2552040.

The previous prime is 3865889. The next prime is 3865907. The reversal of 3865899 is 9985683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3865899 - 2⁵ = 3865867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3865819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5947 + ... + 6564.

It is an arithmetic number, because the mean of its divisors is an integer number (650624).

Almost surely, 2^3865899 is an apocalyptic number.

3865899 is a deficient number, since it is larger than the sum of its proper divisors (1339093).

3865899 is a wasteful number, since it uses less digits than its factorization.

3865899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12617.

The product of its digits is 466560, while the sum is 48.

The square root of 3865899 is about 1966.1889532799. The cubic root of 3865899 is about 156.9459697511.

The spelling of 3865899 in words is "three million, eight hundred sixty-five thousand, eight hundred ninety-nine".