993113988 has 24 divisors (see below), whose sum is σ = 2320473792. Its totient is φ = 330579744.

The previous prime is 993113981. The next prime is 993114011. The reversal of 993113988 is 889311399.

It is a happy number.

It is a super-2 number, since 2×993113988² = 1972550786322528288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 993113988.

It is not an unprimeable number, because it can be changed into a prime (993113981) 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, 48195 + ... + 65642.

It is an arithmetic number, because the mean of its divisors is an integer number (96686408).

Almost surely, 2^993113988 is an apocalyptic number.

It is an amenable number.

993113988 is an abundant number, since it is smaller than the sum of its proper divisors (1327359804).

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

993113988 is a wasteful number, since it uses less digits than its factorization.

993113988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114571 (or 114569 counting only the distinct ones).

The product of its digits is 419904, while the sum is 51.

The square root of 993113988 is about 31513.7111111973. The cubic root of 993113988 is about 997.6993738449.

The spelling of 993113988 in words is "nine hundred ninety-three million, one hundred thirteen thousand, nine hundred eighty-eight".