8136640 has 56 divisors (see below), whose sum is σ = 19824192. Its totient is φ = 3179520.

The previous prime is 8136637. The next prime is 8136649. The reversal of 8136640 is 466318.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 8136599 and 8136608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8136649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14770 + ... + 15310.

Almost surely, 2^8136640 is an apocalyptic number.

8136640 is a gapful number since it is divisible by the number (80) 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 8136640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9912096).

8136640 is an abundant number, since it is smaller than the sum of its proper divisors (11687552).

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

8136640 is a wasteful number, since it uses less digits than its factorization.

8136640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 8136640 is about 2852.4796230648. The cubic root of 8136640 is about 201.1322446806.

It can be divided in two parts, 81366 and 40, that added together give a triangular number (81406 = T₄₀₃).

The spelling of 8136640 in words is "eight million, one hundred thirty-six thousand, six hundred forty".