3866889 has 24 divisors (see below), whose sum is σ = 5797440. Its totient is φ = 2288832.

The previous prime is 3866881. The next prime is 3866903. The reversal of 3866889 is 9886683.

It is not a de Polignac number, because 3866889 - 2³ = 3866881 is a prime.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3866881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14572 + ... + 14834.

It is an arithmetic number, because the mean of its divisors is an integer number (241560).

Almost surely, 2^3866889 is an apocalyptic number.

3866889 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3866889 is a deficient number, since it is larger than the sum of its proper divisors (1930551).

3866889 is a wasteful number, since it uses less digits than its factorization.

3866889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 308 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 3866889 is about 1966.4406932323. The cubic root of 3866889 is about 156.9593657942.

The spelling of 3866889 in words is "three million, eight hundred sixty-six thousand, eight hundred eighty-nine".