861344 has 24 divisors (see below), whose sum is σ = 1850688. Its totient is φ = 391360.

The previous prime is 861317. The next prime is 861347. The reversal of 861344 is 443168.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 861344.

It is not an unprimeable number, because it can be changed into a prime (861347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872 + ... + 1575.

It is an arithmetic number, because the mean of its divisors is an integer number (77112).

2⁸⁶¹³⁴⁴ is an apocalyptic number.

It is an amenable number.

861344 is an abundant number, since it is smaller than the sum of its proper divisors (989344).

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

861344 is a wasteful number, since it uses less digits than its factorization.

861344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468 (or 2460 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 861344 is about 928.0862028928. The cubic root of 861344 is about 95.1463671730.

The spelling of 861344 in words is "eight hundred sixty-one thousand, three hundred forty-four".