855760 has 40 divisors (see below), whose sum is σ = 2098080. Its totient is φ = 323712.

The previous prime is 855739. The next prime is 855781. The reversal of 855760 is 67558.

855760 = T₁₄₄ + T₁₄₅ + ... + T₂₀₀.

It is an interprime number because it is at equal distance from previous prime (855739) and next prime (855781).

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1239 + ... + 1801.

It is an arithmetic number, because the mean of its divisors is an integer number (52452).

2⁸⁵⁵⁷⁶⁰ is an apocalyptic number.

855760 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 855760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1049040).

855760 is an abundant number, since it is smaller than the sum of its proper divisors (1242320).

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

855760 is a wasteful number, since it uses less digits than its factorization.

855760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 855760 is about 925.0729700948. The cubic root of 855760 is about 94.9403133851.

The spelling of 855760 in words is "eight hundred fifty-five thousand, seven hundred sixty".