8921864 has 16 divisors (see below), whose sum is σ = 19118400. Its totient is φ = 3823632.

The previous prime is 8921863. The next prime is 8921867. The reversal of 8921864 is 4681298.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8921863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79604 + ... + 79715.

It is an arithmetic number, because the mean of its divisors is an integer number (1194900).

Almost surely, 2^8921864 is an apocalyptic number.

It is an amenable number.

8921864 is an abundant number, since it is smaller than the sum of its proper divisors (10196536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8921864 is a wasteful number, since it uses less digits than its factorization.

8921864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159332 (or 159328 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 8921864 is about 2986.9489449939. The cubic root of 8921864 is about 207.4046709736.

The spelling of 8921864 in words is "eight million, nine hundred twenty-one thousand, eight hundred sixty-four".