8698640 has 40 divisors (see below), whose sum is σ = 20355840. Its totient is φ = 3456896.

The previous prime is 8698639. The next prime is 8698643. The reversal of 8698640 is 468968.

8698640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8698643) 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, 17921 + ... + 18399.

It is an arithmetic number, because the mean of its divisors is an integer number (508896).

Almost surely, 2^8698640 is an apocalyptic number.

8698640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8698640 is an abundant number, since it is smaller than the sum of its proper divisors (11657200).

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

8698640 is a wasteful number, since it uses less digits than its factorization.

8698640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 8698640 is about 2949.3456901489. The cubic root of 8698640 is about 205.6602941052.

The spelling of 8698640 in words is "eight million, six hundred ninety-eight thousand, six hundred forty".