869555268 has 72 divisors (see below), whose sum is σ = 2236361400. Its totient is φ = 284829696.

The previous prime is 869555243. The next prime is 869555339. The reversal of 869555268 is 862555968.

869555268 is a `hidden beast` number, since 8 + 69 + 55 + 526 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 522031104 + 347524164 = 22848^2 + 18642^2 .

It is a super-2 number, since 2×869555268² = 1512252728213103648, which contains 22 as substring.

Its product of digits (5184000) is a multiple of the sum of its prime divisors (1296).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1074448 + ... + 1075256.

It is an arithmetic number, because the mean of its divisors is an integer number (31060575).

Almost surely, 2^869555268 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 869555268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1118180700).

869555268 is an abundant number, since it is smaller than the sum of its proper divisors (1366806132).

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

869555268 is a wasteful number, since it uses less digits than its factorization.

869555268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301 (or 1296 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The square root of 869555268 is about 29488.2225303595. Note that the first 3 decimals coincide. The cubic root of 869555268 is about 954.4775768975.

The spelling of 869555268 in words is "eight hundred sixty-nine million, five hundred fifty-five thousand, two hundred sixty-eight".