9889743428 has 12 divisors (see below), whose sum is σ = 18217948560. Its totient is φ = 4684615272.

The previous prime is 9889743403. The next prime is 9889743439. The reversal of 9889743428 is 8243479889.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65064026 + ... + 65064177.

It is an arithmetic number, because the mean of its divisors is an integer number (1518162380).

Almost surely, 2^9889743428 is an apocalyptic number.

It is an amenable number.

9889743428 is a deficient number, since it is larger than the sum of its proper divisors (8328205132).

9889743428 is a wasteful number, since it uses less digits than its factorization.

9889743428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130128226 (or 130128224 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 62.

The square root of 9889743428 is about 99447.1891407696. The cubic root of 9889743428 is about 2146.4873905533.

The spelling of 9889743428 in words is "nine billion, eight hundred eighty-nine million, seven hundred forty-three thousand, four hundred twenty-eight".