993128972 has 24 divisors (see below), whose sum is σ = 1922683392. Its totient is φ = 445062800.

The previous prime is 993128959. The next prime is 993128977. The reversal of 993128972 is 279821399.

993128972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 993128972.

It is not an unprimeable number, because it can be changed into a prime (993128977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155828 + ... + 162075.

It is an arithmetic number, because the mean of its divisors is an integer number (80111808).

Almost surely, 2^993128972 is an apocalyptic number.

It is an amenable number.

993128972 is a deficient number, since it is larger than the sum of its proper divisors (929554420).

993128972 is a wasteful number, since it uses less digits than its factorization.

993128972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317989 (or 317987 counting only the distinct ones).

The product of its digits is 489888, while the sum is 50.

The square root of 993128972 is about 31513.9488480895. The cubic root of 993128972 is about 997.7043915476.

The spelling of 993128972 in words is "nine hundred ninety-three million, one hundred twenty-eight thousand, nine hundred seventy-two".