8659440 has 160 divisors (see below), whose sum is σ = 31545600. Its totient is φ = 2177280.

The previous prime is 8659423. The next prime is 8659457. The reversal of 8659440 is 449568.

It is an interprime number because it is at equal distance from previous prime (8659423) and next prime (8659457).

It is a super-2 number, since 2×8659440² = 149971802227200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 8659395 and 8659404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40935 + ... + 41145.

It is an arithmetic number, because the mean of its divisors is an integer number (197160).

Almost surely, 2^8659440 is an apocalyptic number.

8659440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8659440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15772800).

8659440 is an abundant number, since it is smaller than the sum of its proper divisors (22886160).

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

8659440 is a wasteful number, since it uses less digits than its factorization.

8659440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 8659440 is about 2942.6926445010. The cubic root of 8659440 is about 205.3508961571.

The spelling of 8659440 in words is "eight million, six hundred fifty-nine thousand, four hundred forty".