861896 has 16 divisors (see below), whose sum is σ = 1847040. Its totient is φ = 369360.

The previous prime is 861881. The next prime is 861899. The reversal of 861896 is 698168.

It is not an unprimeable number, because it can be changed into a prime (861899) by changing a digit.

861896 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 3 ways as a sum of consecutive naturals, for example, 7640 + ... + 7751.

It is an arithmetic number, because the mean of its divisors is an integer number (115440).

2⁸⁶¹⁸⁹⁶ is an apocalyptic number.

It is an amenable number.

861896 is an abundant number, since it is smaller than the sum of its proper divisors (985144).

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

861896 is a wasteful number, since it uses less digits than its factorization.

861896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15404 (or 15400 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 861896 is about 928.3835414310. The cubic root of 861896 is about 95.1666879660.

The spelling of 861896 in words is "eight hundred sixty-one thousand, eight hundred ninety-six".