8640936 has 48 divisors (see below), whose sum is σ = 23955360. Its totient is φ = 2812320.

The previous prime is 8640911. The next prime is 8640949. The reversal of 8640936 is 6390468.

8640936 is a `hidden beast` number, since 8 + 640 + 9 + 3 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 8640936.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1701 + ... + 4491.

It is an arithmetic number, because the mean of its divisors is an integer number (499070).

Almost surely, 2^8640936 is an apocalyptic number.

8640936 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8640936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11977680).

8640936 is an abundant number, since it is smaller than the sum of its proper divisors (15314424).

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

8640936 is a wasteful number, since it uses less digits than its factorization.

8640936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846 (or 2839 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 8640936 is about 2939.5469038612. The cubic root of 8640936 is about 205.2045232294.

The spelling of 8640936 in words is "eight million, six hundred forty thousand, nine hundred thirty-six".