8688740 has 12 divisors (see below), whose sum is σ = 18246396. Its totient is φ = 3475488.

The previous prime is 8688739. The next prime is 8688787. The reversal of 8688740 is 478868.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2408704 + 6280036 = 1552^2 + 2506^2 .

It is an Ulam 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, 217199 + ... + 217238.

It is an arithmetic number, because the mean of its divisors is an integer number (1520533).

Almost surely, 2^8688740 is an apocalyptic number.

It is an amenable number.

8688740 is an abundant number, since it is smaller than the sum of its proper divisors (9557656).

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

8688740 is a wasteful number, since it uses less digits than its factorization.

8688740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434446 (or 434444 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 8688740 is about 2947.6668739870. Note that the first 3 decimals coincide. The cubic root of 8688740 is about 205.5822432141.

The spelling of 8688740 in words is "eight million, six hundred eighty-eight thousand, seven hundred forty".