9489939788 has 48 divisors (see below), whose sum is σ = 19089229824. Its totient is φ = 4043753280.

The previous prime is 9489939773. The next prime is 9489939791. The reversal of 9489939788 is 8879399849.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4908470 + ... + 4910402.

It is an arithmetic number, because the mean of its divisors is an integer number (397692288).

Almost surely, 2^9489939788 is an apocalyptic number.

It is an amenable number.

9489939788 is an abundant number, since it is smaller than the sum of its proper divisors (9599290036).

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

9489939788 is a wasteful number, since it uses less digits than its factorization.

9489939788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862 (or 2860 counting only the distinct ones).

The product of its digits is 282175488, while the sum is 74.

The square root of 9489939788 is about 97416.3219794301. The cubic root of 9489939788 is about 2117.1639266158.

The spelling of 9489939788 in words is "nine billion, four hundred eighty-nine million, nine hundred thirty-nine thousand, seven hundred eighty-eight".