855580 has 24 divisors (see below), whose sum is σ = 1960560. Its totient is φ = 311040.

The previous prime is 855527. The next prime is 855581. The reversal of 855580 is 85558.

It is a happy number.

It is a super-3 number, since 3×855580³ = 1878897664683336000, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1725 + ... + 2164.

It is an arithmetic number, because the mean of its divisors is an integer number (81690).

2⁸⁵⁵⁵⁸⁰ is an apocalyptic number.

It is an amenable number.

855580 is an abundant number, since it is smaller than the sum of its proper divisors (1104980).

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

855580 is a wasteful number, since it uses less digits than its factorization.

855580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3909 (or 3907 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 31.

The square root of 855580 is about 924.9756753558. The cubic root of 855580 is about 94.9336563572.

It can be divided in two parts, 85 and 5580, that added together give a palindrome (5665).

The spelling of 855580 in words is "eight hundred fifty-five thousand, five hundred eighty".