869636 has 6 divisors (see below), whose sum is σ = 1521870. Its totient is φ = 434816.

The previous prime is 869599. The next prime is 869657. The reversal of 869636 is 636968.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 732736 + 136900 = 856^2 + 370^2 .

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 869636.

It is an unprimeable number.

869636 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 108701 + ... + 108708.

It is an arithmetic number, because the mean of its divisors is an integer number (253645).

2⁸⁶⁹⁶³⁶ is an apocalyptic number.

It is an amenable number.

869636 is a deficient number, since it is larger than the sum of its proper divisors (652234).

869636 is a wasteful number, since it uses less digits than its factorization.

869636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217413 (or 217411 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 869636 is about 932.5427604137. The cubic root of 869636 is about 95.4507114793.

The spelling of 869636 in words is "eight hundred sixty-nine thousand, six hundred thirty-six".