993280228 has 12 divisors (see below), whose sum is σ = 1757771820. Its totient is φ = 491059712.

The previous prime is 993280219. The next prime is 993280229. The reversal of 993280228 is 822082399.

It can be written as a sum of positive squares in 2 ways, for example, as 574177444 + 419102784 = 23962^2 + 20472^2 .

It is a super-2 number, since 2×993280228² = 1973211222671463968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (993280229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394701 + ... + 1395412.

It is an arithmetic number, because the mean of its divisors is an integer number (146480985).

Almost surely, 2^993280228 is an apocalyptic number.

It is an amenable number.

993280228 is a deficient number, since it is larger than the sum of its proper divisors (764491592).

993280228 is a wasteful number, since it uses less digits than its factorization.

993280228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790206 (or 2790204 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 993280228 is about 31516.3485829180. The cubic root of 993280228 is about 997.7550399257.

The spelling of 993280228 in words is "nine hundred ninety-three million, two hundred eighty thousand, two hundred twenty-eight".