8397864 has 64 divisors (see below), whose sum is σ = 24710400. Its totient is φ = 2633472.

The previous prime is 8397863. The next prime is 8397877. The reversal of 8397864 is 4687938.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8397863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2529 + ... + 4815.

It is an arithmetic number, because the mean of its divisors is an integer number (386100).

Almost surely, 2^8397864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8397864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12355200).

8397864 is an abundant number, since it is smaller than the sum of its proper divisors (16312536).

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

8397864 is a wasteful number, since it uses less digits than its factorization.

8397864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319 (or 2309 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 8397864 is about 2897.9068308005. The cubic root of 8397864 is about 203.2620395640.

It can be divided in two parts, 8397 and 864, that added together give a cube (9261 = 21³).

The spelling of 8397864 in words is "eight million, three hundred ninety-seven thousand, eight hundred sixty-four".