993397284 has 120 divisors (see below), whose sum is σ = 2848603296. Its totient is φ = 299376000.

The previous prime is 993397283. The next prime is 993397289. The reversal of 993397284 is 482793399.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 993397284.

It is not an unprimeable number, because it can be changed into a prime (993397283) 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 39 ways as a sum of consecutive naturals, for example, 751344 + ... + 752664.

Almost surely, 2^993397284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 993397284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1424301648).

993397284 is an abundant number, since it is smaller than the sum of its proper divisors (1855206012).

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

993397284 is a wasteful number, since it uses less digits than its factorization.

993397284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559 (or 1548 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 993397284 is about 31518.2055961313. The cubic root of 993397284 is about 997.7942328352.

The spelling of 993397284 in words is "nine hundred ninety-three million, three hundred ninety-seven thousand, two hundred eighty-four".