989993048938 has 8 divisors (see below), whose sum is σ = 1485230544288. Its totient is φ = 494916200844.

The previous prime is 989993048921. The next prime is 989993048951. The reversal of 989993048938 is 839840399989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40146406 + ... + 40171057.

It is an arithmetic number, because the mean of its divisors is an integer number (185653818036).

Almost surely, 2^989993048938 is an apocalyptic number.

989993048938 is a deficient number, since it is larger than the sum of its proper divisors (495237495350).

989993048938 is a wasteful number, since it uses less digits than its factorization.

989993048938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80323628.

The product of its (nonzero) digits is 1088391168, while the sum is 79.

The spelling of 989993048938 in words is "nine hundred eighty-nine billion, nine hundred ninety-three million, forty-eight thousand, nine hundred thirty-eight".