8487640 has 32 divisors (see below), whose sum is σ = 21826080. Its totient is φ = 2909952.

The previous prime is 8487631. The next prime is 8487649. The reversal of 8487640 is 467848.

It is an interprime number because it is at equal distance from previous prime (8487631) and next prime (8487649).

It is a self number, because there is not a number n which added to its sum of digits gives 8487640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8487649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14877 + ... + 15436.

It is an arithmetic number, because the mean of its divisors is an integer number (682065).

Almost surely, 2^8487640 is an apocalyptic number.

It is an amenable number.

8487640 is an abundant number, since it is smaller than the sum of its proper divisors (13338440).

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

8487640 is a wasteful number, since it uses less digits than its factorization.

8487640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30331 (or 30327 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 8487640 is about 2913.3554537680. The cubic root of 8487640 is about 203.9837869981.

The spelling of 8487640 in words is "eight million, four hundred eighty-seven thousand, six hundred forty".