8863640 has 32 divisors (see below), whose sum is σ = 20230560. Its totient is φ = 3494400.

The previous prime is 8863639. The next prime is 8863643. The reversal of 8863640 is 463688.

8863640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8863640² = 157128228099200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8863640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8863643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280 + ... + 4400.

It is an arithmetic number, because the mean of its divisors is an integer number (632205).

Almost surely, 2^8863640 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 8863640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10115280).

8863640 is an abundant number, since it is smaller than the sum of its proper divisors (11366920).

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

8863640 is a wasteful number, since it uses less digits than its factorization.

8863640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203 (or 3199 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 8863640 is about 2977.1865913980. The cubic root of 8863640 is about 206.9525123084.

The spelling of 8863640 in words is "eight million, eight hundred sixty-three thousand, six hundred forty".