11331428688 has 80 divisors (see below), whose sum is σ = 32550019840. Its totient is φ = 3774283776.

The previous prime is 11331428687. The next prime is 11331428707. The reversal of 11331428688 is 88682413311.

11331428688 is a `hidden beast` number, since 113 + 31 + 428 + 6 + 88 = 666.

It is a super-2 number, since 2×11331428688² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331428687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 605520 + ... + 623952.

It is an arithmetic number, because the mean of its divisors is an integer number (406875248).

Almost surely, 2^11331428688 is an apocalyptic number.

11331428688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11331428688 is an abundant number, since it is smaller than the sum of its proper divisors (21218591152).

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

11331428688 is a wasteful number, since it uses less digits than its factorization.

11331428688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19873 (or 19861 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The spelling of 11331428688 in words is "eleven billion, three hundred thirty-one million, four hundred twenty-eight thousand, six hundred eighty-eight".