868136 has 8 divisors (see below), whose sum is σ = 1627770. Its totient is φ = 434064.

The previous prime is 868123. The next prime is 868151. The reversal of 868136 is 631868.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 244036 = 790^2 + 494^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×868136² = 1507320228992, which contains 22 as substring.

It is a plaindrome in base 15.

It is an unprimeable number.

868136 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54251 + ... + 54266.

2⁸⁶⁸¹³⁶ is an apocalyptic number.

It is an amenable number.

868136 is a deficient number, since it is larger than the sum of its proper divisors (759634).

868136 is a wasteful number, since it uses less digits than its factorization.

868136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108523 (or 108519 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 868136 is about 931.7381606439. The cubic root of 868136 is about 95.3958002039.

The spelling of 868136 in words is "eight hundred sixty-eight thousand, one hundred thirty-six".