8287640 has 16 divisors (see below), whose sum is σ = 18647280. Its totient is φ = 3315040.

The previous prime is 8287607. The next prime is 8287679. The reversal of 8287640 is 467828.

It is a self number, because there is not a number n which added to its sum of digits gives 8287640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103556 + ... + 103635.

It is an arithmetic number, because the mean of its divisors is an integer number (1165455).

Almost surely, 2^8287640 is an apocalyptic number.

It is an amenable number.

8287640 is an abundant number, since it is smaller than the sum of its proper divisors (10359640).

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

8287640 is a wasteful number, since it uses less digits than its factorization.

8287640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207202 (or 207198 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 8287640 is about 2878.8261496659. The cubic root of 8287640 is about 202.3688323955.

The spelling of 8287640 in words is "eight million, two hundred eighty-seven thousand, six hundred forty".