8861985 has 24 divisors (see below), whose sum is σ = 16758144. Its totient is φ = 4296480.

The previous prime is 8861929. The next prime is 8861987. The reversal of 8861985 is 5891688.

It is not a de Polignac number, because 8861985 - 2⁶ = 8861921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8861985.

It is not an unprimeable number, because it can be changed into a prime (8861987) 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, 8457 + ... + 9446.

It is an arithmetic number, because the mean of its divisors is an integer number (698256).

Almost surely, 2^8861985 is an apocalyptic number.

It is an amenable number.

8861985 is a deficient number, since it is larger than the sum of its proper divisors (7896159).

8861985 is a wasteful number, since it uses less digits than its factorization.

8861985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17925 (or 17922 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 8861985 is about 2976.9086314497. The cubic root of 8861985 is about 206.9396309290.

The spelling of 8861985 in words is "eight million, eight hundred sixty-one thousand, nine hundred eighty-five".