8687240 has 32 divisors (see below), whose sum is σ = 20223000. Its totient is φ = 3354624.

The previous prime is 8687233. The next prime is 8687249. The reversal of 8687240 is 427868.

It can be written as a sum of positive squares in 4 ways, for example, as 7043716 + 1643524 = 2654^2 + 1282^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8687240.

It is not an unprimeable number, because it can be changed into a prime (8687249) 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, 2585 + ... + 4904.

Almost surely, 2^8687240 is an apocalyptic number.

It is an amenable number.

8687240 is an abundant number, since it is smaller than the sum of its proper divisors (11535760).

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

8687240 is a wasteful number, since it uses less digits than its factorization.

8687240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7529 (or 7525 counting only the distinct ones).

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

The square root of 8687240 is about 2947.4124244836. The cubic root of 8687240 is about 205.5704121502.

The spelling of 8687240 in words is "eight million, six hundred eighty-seven thousand, two hundred forty".