865080 has 96 divisors (see below), whose sum is σ = 2948400. Its totient is φ = 228096.

The previous prime is 865069. The next prime is 865087. The reversal of 865080 is 80568.

865080 is a `hidden beast` number, since 8 + 650 + 8 + 0 = 666.

865080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865087) by changing a digit.

865080 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9676 + ... + 9764.

2⁸⁶⁵⁰⁸⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1474200).

865080 is an abundant number, since it is smaller than the sum of its proper divisors (2083320).

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

865080 is a wasteful number, since it uses less digits than its factorization.

865080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 865080 is about 930.0967691590. The cubic root of 865080 is about 95.2837316204.

The spelling of 865080 in words is "eight hundred sixty-five thousand, eighty".