868120236 has 18 divisors (see below), whose sum is σ = 2194415132. Its totient is φ = 289373400.

The previous prime is 868120223. The next prime is 868120237. The reversal of 868120236 is 632021868.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 24114451 = 868120236 / (8 + 6 + 8 + 1 + 2 + 0 + 2 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 868120236.

It is not an unprimeable number, because it can be changed into a prime (868120237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12057190 + ... + 12057261.

Almost surely, 2^868120236 is an apocalyptic number.

It is an amenable number.

868120236 is an abundant number, since it is smaller than the sum of its proper divisors (1326294896).

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

868120236 is a wasteful number, since it uses less digits than its factorization.

868120236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24114461 (or 24114456 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 868120236 is about 29463.8801925340. The cubic root of 868120236 is about 953.9522278730.

It can be divided in two parts, 868 and 120236, that added together give a square (121104 = 348²).

The spelling of 868120236 in words is "eight hundred sixty-eight million, one hundred twenty thousand, two hundred thirty-six".