11728276686 has 128 divisors (see below), whose sum is σ = 31808102400. Its totient is φ = 3130928640.

The previous prime is 11728276669. The next prime is 11728276697. The reversal of 11728276686 is 68667282711.

It is a super-2 number, since 2×11728276686² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 322566 + ... + 357078.

It is an arithmetic number, because the mean of its divisors is an integer number (248500800).

Almost surely, 2^11728276686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11728276686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15904051200).

11728276686 is an abundant number, since it is smaller than the sum of its proper divisors (20079825714).

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

11728276686 is a wasteful number, since it uses less digits than its factorization.

11728276686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34591 (or 34585 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The spelling of 11728276686 in words is "eleven billion, seven hundred twenty-eight million, two hundred seventy-six thousand, six hundred eighty-six".