8641881 has 12 divisors (see below), whose sum is σ = 12567360. Its totient is φ = 5722200.

The previous prime is 8641873. The next prime is 8641883. The reversal of 8641881 is 1881468.

8641881 is a `hidden beast` number, since 8 + 641 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 8641881 - 2³ = 8641873 is a prime.

It is a super-2 number, since 2×8641881² = 149364214436322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8641883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1821 + ... + 4538.

It is an arithmetic number, because the mean of its divisors is an integer number (1047280).

Almost surely, 2^8641881 is an apocalyptic number.

It is an amenable number.

8641881 is a deficient number, since it is larger than the sum of its proper divisors (3925479).

8641881 is a wasteful number, since it uses less digits than its factorization.

8641881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6516 (or 6513 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 8641881 is about 2939.7076385246. The cubic root of 8641881 is about 205.2120035612.

The spelling of 8641881 in words is "eight million, six hundred forty-one thousand, eight hundred eighty-one".