9913681228 has 12 divisors (see below), whose sum is σ = 18926118792. Its totient is φ = 4506218720.

The previous prime is 9913681207. The next prime is 9913681229. The reversal of 9913681228 is 8221863199.

9913681228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (9913681229) 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 3 ways as a sum of consecutive naturals, for example, 112655425 + ... + 112655512.

It is an arithmetic number, because the mean of its divisors is an integer number (1577176566).

Almost surely, 2^9913681228 is an apocalyptic number.

It is an amenable number.

9913681228 is a deficient number, since it is larger than the sum of its proper divisors (9012437564).

9913681228 is a wasteful number, since it uses less digits than its factorization.

9913681228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225310952 (or 225310950 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The square root of 9913681228 is about 99567.4707321623. The cubic root of 9913681228 is about 2148.2178292847.

The spelling of 9913681228 in words is "nine billion, nine hundred thirteen million, six hundred eighty-one thousand, two hundred twenty-eight".