8861865 has 32 divisors (see below), whose sum is σ = 14743296. Its totient is φ = 4542720.

The previous prime is 8861861. The next prime is 8861869. The reversal of 8861865 is 5681688.

It is an interprime number because it is at equal distance from previous prime (8861861) and next prime (8861869).

It is not a de Polignac number, because 8861865 - 2² = 8861861 is a prime.

8861865 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8861861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56367 + ... + 56523.

It is an arithmetic number, because the mean of its divisors is an integer number (460728).

Almost surely, 2^8861865 is an apocalyptic number.

It is an amenable number.

8861865 is a deficient number, since it is larger than the sum of its proper divisors (5881431).

8861865 is a wasteful number, since it uses less digits than its factorization.

8861865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289.

The product of its digits is 92160, while the sum is 42.

The square root of 8861865 is about 2976.8884762450. Note that the first 3 decimals coincide. The cubic root of 8861865 is about 206.9386968694.

The spelling of 8861865 in words is "eight million, eight hundred sixty-one thousand, eight hundred sixty-five".