855504 has 60 divisors (see below), whose sum is σ = 2584036. Its totient is φ = 262656.

The previous prime is 855499. The next prime is 855511. The reversal of 855504 is 405558.

It can be written as a sum of positive squares in 2 ways, for example, as 435600 + 419904 = 660^2 + 648^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1644 + ... + 2100.

2⁸⁵⁵⁵⁰⁴ 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 855504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1292018).

855504 is an abundant number, since it is smaller than the sum of its proper divisors (1728532).

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

855504 is a wasteful number, since it uses less digits than its factorization.

855504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 855504 is about 924.9345922821. The cubic root of 855504 is about 94.9308453317.

The spelling of 855504 in words is "eight hundred fifty-five thousand, five hundred four".