8618320 has 40 divisors (see below), whose sum is σ = 21219624. Its totient is φ = 3244032.

The previous prime is 8618317. The next prime is 8618327. The reversal of 8618320 is 238168.

It can be written as a sum of positive squares in 4 ways, for example, as 1263376 + 7354944 = 1124^2 + 2712^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8618327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1809 + ... + 4528.

Almost surely, 2^8618320 is an apocalyptic number.

8618320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8618320 is an abundant number, since it is smaller than the sum of its proper divisors (12601304).

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

8618320 is a wasteful number, since it uses less digits than its factorization.

8618320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6367 (or 6361 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 8618320 is about 2935.6975321037. The cubic root of 8618320 is about 205.0253389262.

The spelling of 8618320 in words is "eight million, six hundred eighteen thousand, three hundred twenty".