8873640 has 72 divisors (see below), whose sum is σ = 29024190. Its totient is φ = 2351232.

The previous prime is 8873639. The next prime is 8873663. The reversal of 8873640 is 463788.

8873640 is a `hidden beast` number, since 8 + 8 + 7 + 3 + 640 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 5391684 + 3481956 = 2322^2 + 1866^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 8873595 and 8873604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 56442 + ... + 56598.

Almost surely, 2^8873640 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 8873640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14512095).

8873640 is an abundant number, since it is smaller than the sum of its proper divisors (20150550).

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

8873640 is a wasteful number, since it uses less digits than its factorization.

8873640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 8873640 is about 2978.8655558786. The cubic root of 8873640 is about 207.0303113212.

The spelling of 8873640 in words is "eight million, eight hundred seventy-three thousand, six hundred forty".