859890 has 16 divisors (see below), whose sum is σ = 2063808. Its totient is φ = 229296.

The previous prime is 859861. The next prime is 859891. The reversal of 859890 is 98958.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 859890.

It is not an unprimeable number, because it can be changed into a prime (859891) 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, 14302 + ... + 14361.

It is an arithmetic number, because the mean of its divisors is an integer number (128988).

2⁸⁵⁹⁸⁹⁰ is an apocalyptic number.

859890 is an abundant number, since it is smaller than the sum of its proper divisors (1203918).

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

859890 is a wasteful number, since it uses less digits than its factorization.

859890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28673.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 859890 is about 927.3025396277. The cubic root of 859890 is about 95.0927994407.

The spelling of 859890 in words is "eight hundred fifty-nine thousand, eight hundred ninety".