861340 has 12 divisors (see below), whose sum is σ = 1808856. Its totient is φ = 344528.

The previous prime is 861317. The next prime is 861347. The reversal of 861340 is 43168.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21514 + ... + 21553.

It is an arithmetic number, because the mean of its divisors is an integer number (150738).

2⁸⁶¹³⁴⁰ is an apocalyptic number.

It is an amenable number.

861340 is an abundant number, since it is smaller than the sum of its proper divisors (947516).

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

861340 is a wasteful number, since it uses less digits than its factorization.

861340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43076 (or 43074 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 861340 is about 928.0840479181. The cubic root of 861340 is about 95.1462198892.

The spelling of 861340 in words is "eight hundred sixty-one thousand, three hundred forty".