861876 has 36 divisors (see below), whose sum is σ = 2211300. Its totient is φ = 283008.

The previous prime is 861871. The next prime is 861877. The reversal of 861876 is 678168.

861876 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 104976 + 756900 = 324^2 + 870^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 861876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861871) by changing a digit.

861876 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3070 + ... + 3338.

It is an arithmetic number, because the mean of its divisors is an integer number (61425).

2⁸⁶¹⁸⁷⁶ 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 861876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1105650).

861876 is an abundant number, since it is smaller than the sum of its proper divisors (1349424).

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

861876 is a wasteful number, since it uses less digits than its factorization.

861876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 363 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 861876 is about 928.3727699583. The cubic root of 861876 is about 95.1659518569.

The spelling of 861876 in words is "eight hundred sixty-one thousand, eight hundred seventy-six".