108656640 has 240 divisors, whose sum is σ = 392432040. Its totient is φ = 28753920.

The previous prime is 108656633. The next prime is 108656641. The reversal of 108656640 is 46656801.

108656640 is a `hidden beast` number, since 1 + 0 + 8 + 6 + 5 + 6 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 108656595 and 108656604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108656641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 829375 + ... + 829505.

Almost surely, 2^108656640 is an apocalyptic number.

108656640 is a gapful number since it is divisible by the number (10) 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 108656640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196216020).

108656640 is an abundant number, since it is smaller than the sum of its proper divisors (283775400).

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

108656640 is an equidigital number, since it uses as much as digits as its factorization.

108656640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 141 counting only the distinct ones).

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

The square root of 108656640 is about 10423.8495768118. The cubic root of 108656640 is about 477.1835059936.

The spelling of 108656640 in words is "one hundred eight million, six hundred fifty-six thousand, six hundred forty".