864136 has 32 divisors (see below), whose sum is σ = 1995840. Its totient is φ = 341568.

The previous prime is 864131. The next prime is 864137. The reversal of 864136 is 631468.

864136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (864131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135 + ... + 1321.

It is an arithmetic number, because the mean of its divisors is an integer number (62370).

2⁸⁶⁴¹³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (997920).

864136 is an abundant number, since it is smaller than the sum of its proper divisors (1131704).

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

864136 is a wasteful number, since it uses less digits than its factorization.

864136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213 (or 1209 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 864136 is about 929.5891565633. The cubic root of 864136 is about 95.2490602296.

It can be divided in two parts, 864 and 136, that added together give a cube (1000 = 10³).

The spelling of 864136 in words is "eight hundred sixty-four thousand, one hundred thirty-six".