8657240 has 16 divisors (see below), whose sum is σ = 19478880. Its totient is φ = 3462880.

The previous prime is 8657239. The next prime is 8657249. The reversal of 8657240 is 427568.

It is a junction number, because it is equal to n+sod(n) for n = 8657197 and 8657206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8657249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108176 + ... + 108255.

It is an arithmetic number, because the mean of its divisors is an integer number (1217430).

Almost surely, 2^8657240 is an apocalyptic number.

It is an amenable number.

8657240 is an abundant number, since it is smaller than the sum of its proper divisors (10821640).

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

8657240 is a wasteful number, since it uses less digits than its factorization.

8657240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216442 (or 216438 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 8657240 is about 2942.3188134531. The cubic root of 8657240 is about 205.3335043382. Note that the first 3 decimals are identical.

The spelling of 8657240 in words is "eight million, six hundred fifty-seven thousand, two hundred forty".