989021228 has 24 divisors (see below), whose sum is σ = 1889465088. Its totient is φ = 450216576.

The previous prime is 989021213. The next prime is 989021233. The reversal of 989021228 is 822120989.

989021228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126476 + ... + 134067.

It is an arithmetic number, because the mean of its divisors is an integer number (78727712).

Almost surely, 2^989021228 is an apocalyptic number.

It is an amenable number.

989021228 is a deficient number, since it is larger than the sum of its proper divisors (900443860).

989021228 is a wasteful number, since it uses less digits than its factorization.

989021228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260633 (or 260631 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 989021228 is about 31448.7078907862. The cubic root of 989021228 is about 996.3269344410.

The spelling of 989021228 in words is "nine hundred eighty-nine million, twenty-one thousand, two hundred twenty-eight".