116821128 has 64 divisors (see below), whose sum is σ = 298598400. Its totient is φ = 38077760.

The previous prime is 116821109. The next prime is 116821141. The reversal of 116821128 is 821128611.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 116821095 and 116821104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304825 + ... + 305207.

It is an arithmetic number, because the mean of its divisors is an integer number (4665600).

Almost surely, 2^116821128 is an apocalyptic number.

It is an amenable number.

116821128 is an abundant number, since it is smaller than the sum of its proper divisors (181777272).

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

116821128 is a wasteful number, since it uses less digits than its factorization.

116821128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 638 counting only the distinct ones).

The product of its digits is 1536, while the sum is 30.

The square root of 116821128 is about 10808.3823026390. The cubic root of 116821128 is about 488.8479501838.

Adding to 116821128 its reverse (821128611), we get a palindrome (937949739).

The spelling of 116821128 in words is "one hundred sixteen million, eight hundred twenty-one thousand, one hundred twenty-eight".