8869861 has 16 divisors (see below), whose sum is σ = 11910528. Its totient is φ = 6379200.

The previous prime is 8869859. The next prime is 8869867. The reversal of 8869861 is 1689688.

It is a cyclic number.

It is not a de Polignac number, because 8869861 - 2¹ = 8869859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8869867) 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, 3430 + ... + 5431.

It is an arithmetic number, because the mean of its divisors is an integer number (744408).

Almost surely, 2^8869861 is an apocalyptic number.

It is an amenable number.

8869861 is a deficient number, since it is larger than the sum of its proper divisors (3040667).

8869861 is a wasteful number, since it uses less digits than its factorization.

8869861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8892.

The product of its digits is 165888, while the sum is 46.

The square root of 8869861 is about 2978.2311864595. The cubic root of 8869861 is about 207.0009179481. Note that the first 3 decimals are identical.

It can be divided in two parts, 8869 and 861, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 8869861 in words is "eight million, eight hundred sixty-nine thousand, eight hundred sixty-one".