8987640 has 32 divisors (see below), whose sum is σ = 26963280. Its totient is φ = 2396672.

The previous prime is 8987639. The next prime is 8987653. The reversal of 8987640 is 467898.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 8987592 and 8987601.

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 7 ways as a sum of consecutive naturals, for example, 37329 + ... + 37568.

Almost surely, 2^8987640 is an apocalyptic number.

It is an amenable number.

8987640 is an abundant number, since it is smaller than the sum of its proper divisors (17975640).

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

8987640 is a wasteful number, since it uses less digits than its factorization.

8987640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74911 (or 74907 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 8987640 is about 2997.9392922473. The cubic root of 8987640 is about 207.9131170666.

The spelling of 8987640 in words is "eight million, nine hundred eighty-seven thousand, six hundred forty".