268689474288 has 90 divisors (see below), whose sum is σ = 784738271304. Its totient is φ = 85659596352.

The previous prime is 268689474283. The next prime is 268689474289. The reversal of 268689474288 is 882474986862.

268689474288 is a `hidden beast` number, since 2 + 6 + 86 + 89 + 47 + 428 + 8 = 666.

It is a super-3 number, since 3×268689474288³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268689474283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 29826681 + ... + 29835687.

Almost surely, 2^268689474288 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 268689474288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392369135652).

268689474288 is an abundant number, since it is smaller than the sum of its proper divisors (516048797016).

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

268689474288 is an frugal number, since it uses more digits than its factorization.

268689474288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18051 (or 9035 counting only the distinct ones).

The product of its digits is 594542592, while the sum is 72.

The spelling of 268689474288 in words is "two hundred sixty-eight billion, six hundred eighty-nine million, four hundred seventy-four thousand, two hundred eighty-eight".