993788 has 6 divisors (see below), whose sum is σ = 1739136. Its totient is φ = 496892.

The previous prime is 993781. The next prime is 993793. The reversal of 993788 is 887399.

It is a super-2 number, since 2×993788² = 1975229177888, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 993788.

It is not an unprimeable number, because it can be changed into a prime (993781) by changing a digit.

993788 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 124220 + ... + 124227.

It is an arithmetic number, because the mean of its divisors is an integer number (289856).

2⁹⁹³⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

993788 is a deficient number, since it is larger than the sum of its proper divisors (745348).

993788 is a wasteful number, since it uses less digits than its factorization.

993788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248451 (or 248449 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 993788 is about 996.8891613414. The cubic root of 993788 is about 99.7925030814.

The spelling of 993788 in words is "nine hundred ninety-three thousand, seven hundred eighty-eight".