861382 has 4 divisors (see below), whose sum is σ = 1292076. Its totient is φ = 430690.

The previous prime is 861361. The next prime is 861391. The reversal of 861382 is 283168.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 861382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215344 + ... + 215347.

It is an arithmetic number, because the mean of its divisors is an integer number (323019).

2⁸⁶¹³⁸² is an apocalyptic number.

861382 is a deficient number, since it is larger than the sum of its proper divisors (430694).

861382 is a wasteful number, since it uses less digits than its factorization.

861382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430693.

The product of its digits is 2304, while the sum is 28.

The square root of 861382 is about 928.1066749033. The cubic root of 861382 is about 95.1477663464.

It can be divided in two parts, 8613 and 82, that multiplied together give a triangular number (706266 = T₁₁₈₈).

The spelling of 861382 in words is "eight hundred sixty-one thousand, three hundred eighty-two".