869812 has 12 divisors (see below), whose sum is σ = 1537956. Its totient is φ = 430400.

The previous prime is 869809. The next prime is 869819. The reversal of 869812 is 218968.

869812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 467856 + 401956 = 684^2 + 634^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869819) 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, 673 + ... + 1480.

It is an arithmetic number, because the mean of its divisors is an integer number (128163).

2⁸⁶⁹⁸¹² is an apocalyptic number.

It is an amenable number.

869812 is a deficient number, since it is larger than the sum of its proper divisors (668144).

869812 is a wasteful number, since it uses less digits than its factorization.

869812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258 (or 2256 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 869812 is about 932.6371212857. The cubic root of 869812 is about 95.4571502622.

It can be divided in two parts, 869 and 812, that added together give a square (1681 = 41²).

The spelling of 869812 in words is "eight hundred sixty-nine thousand, eight hundred twelve".