780085 has 8 divisors (see below), whose sum is σ = 947160. Its totient is φ = 616704.

The previous prime is 780061. The next prime is 780119. The reversal of 780085 is 580087.

It can be written as a sum of positive squares in 4 ways, for example, as 17956 + 762129 = 134^2 + 873^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 780085 - 2⁹ = 779573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432 + ... + 1321.

It is an arithmetic number, because the mean of its divisors is an integer number (118395).

2⁷⁸⁰⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

780085 is a deficient number, since it is larger than the sum of its proper divisors (167075).

780085 is a wasteful number, since it uses less digits than its factorization.

780085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 780085 is about 883.2242070958. The cubic root of 780085 is about 92.0549844599.

The spelling of 780085 in words is "seven hundred eighty thousand, eighty-five".