864860850 has 144 divisors (see below), whose sum is σ = 2665757952. Its totient is φ = 196922880.

The previous prime is 864860831. The next prime is 864860851. The reversal of 864860850 is 58068468.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 864860796 and 864860805.

It is not an unprimeable number, because it can be changed into a prime (864860851) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1458154 + ... + 1458746.

It is an arithmetic number, because the mean of its divisors is an integer number (18512208).

Almost surely, 2^864860850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864860850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332878976).

864860850 is an abundant number, since it is smaller than the sum of its proper divisors (1800897102).

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

864860850 is a wasteful number, since it uses less digits than its factorization.

864860850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The square root of 864860850 is about 29408.5166235905. The cubic root of 864860850 is about 952.7568489130.

The spelling of 864860850 in words is "eight hundred sixty-four million, eight hundred sixty thousand, eight hundred fifty".