861392 has 20 divisors (see below), whose sum is σ = 1907616. Its totient is φ = 369120.

The previous prime is 861391. The next prime is 861433. The reversal of 861392 is 293168.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 861392.

It is not an unprimeable number, because it can be changed into a prime (861391) 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, 3734 + ... + 3957.

2⁸⁶¹³⁹² is an apocalyptic number.

It is an amenable number.

861392 is an abundant number, since it is smaller than the sum of its proper divisors (1046224).

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

861392 is a wasteful number, since it uses less digits than its factorization.

861392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7706 (or 7700 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 861392 is about 928.1120621994. The cubic root of 861392 is about 95.1481345431.

The spelling of 861392 in words is "eight hundred sixty-one thousand, three hundred ninety-two".