855890 has 16 divisors (see below), whose sum is σ = 1760832. Its totient is φ = 293424.

The previous prime is 855889. The next prime is 855901. The reversal of 855890 is 98558.

855890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 855890.

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, 6044 + ... + 6183.

It is an arithmetic number, because the mean of its divisors is an integer number (110052).

2⁸⁵⁵⁸⁹⁰ is an apocalyptic number.

855890 is an abundant number, since it is smaller than the sum of its proper divisors (904942).

It is a weird number, because it is abundant, but not a pseudoperfect number.

855890 is a wasteful number, since it uses less digits than its factorization.

855890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12241.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 855890 is about 925.1432321538. The cubic root of 855890 is about 94.9451206581.

The spelling of 855890 in words is "eight hundred fifty-five thousand, eight hundred ninety".