8665920 has 224 divisors, whose sum is σ = 32918400. Its totient is φ = 2138112.

The previous prime is 8665913. The next prime is 8665931. The reversal of 8665920 is 295668.

8665920 is a `hidden beast` number, since 8 + 66 + 592 + 0 = 666.

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

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, 146851 + ... + 146909.

Almost surely, 2^8665920 is an apocalyptic number.

8665920 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 8665920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16459200).

8665920 is an abundant number, since it is smaller than the sum of its proper divisors (24252480).

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

8665920 is a wasteful number, since it uses less digits than its factorization.

8665920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 8665920 is about 2943.7934710166. The cubic root of 8665920 is about 205.4021058590.

It can be divided in two parts, 866 and 5920, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 8665920 in words is "eight million, six hundred sixty-five thousand, nine hundred twenty".