869288 has 48 divisors (see below), whose sum is σ = 2011680. Its totient is φ = 344736.

The previous prime is 869273. The next prime is 869291. The reversal of 869288 is 882968.

869288 = T₉₇ + T₉₈ + ... + T₁₈₂.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

869288 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20195 + ... + 20237.

It is an arithmetic number, because the mean of its divisors is an integer number (41910).

2⁸⁶⁹²⁸⁸ 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 869288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1005840).

869288 is an abundant number, since it is smaller than the sum of its proper divisors (1142392).

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

869288 is a wasteful number, since it uses less digits than its factorization.

869288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 71 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 869288 is about 932.3561551253. The cubic root of 869288 is about 95.4379776921.

It can be divided in two parts, 8 and 69288, that added together give a palindrome (69296).

The spelling of 869288 in words is "eight hundred sixty-nine thousand, two hundred eighty-eight".