3861879 has 16 divisors (see below), whose sum is σ = 5924352. Its totient is φ = 2191968.

The previous prime is 3861877. The next prime is 3861881. The reversal of 3861879 is 9781683.

It is an interprime number because it is at equal distance from previous prime (3861877) and next prime (3861881).

It is not a de Polignac number, because 3861879 - 2¹ = 3861877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3861879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861877) 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, 3102 + ... + 4164.

It is an arithmetic number, because the mean of its divisors is an integer number (370272).

Almost surely, 2^3861879 is an apocalyptic number.

3861879 is a deficient number, since it is larger than the sum of its proper divisors (2062473).

3861879 is a wasteful number, since it uses less digits than its factorization.

3861879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246.

The product of its digits is 72576, while the sum is 42.

The square root of 3861879 is about 1965.1664051678. The cubic root of 3861879 is about 156.8915501869.

The spelling of 3861879 in words is "three million, eight hundred sixty-one thousand, eight hundred seventy-nine".