788221 has 4 divisors (see below), whose sum is σ = 900832. Its totient is φ = 675612.

The previous prime is 788213. The next prime is 788231. The reversal of 788221 is 122887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 788221 - 2³ = 788213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 788221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (788231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56295 + ... + 56308.

It is an arithmetic number, because the mean of its divisors is an integer number (225208).

2⁷⁸⁸²²¹ is an apocalyptic number.

It is an amenable number.

788221 is a deficient number, since it is larger than the sum of its proper divisors (112611).

788221 is a wasteful number, since it uses less digits than its factorization.

788221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112610.

The product of its digits is 1792, while the sum is 28.

The square root of 788221 is about 887.8181120027. The cubic root of 788221 is about 92.3739114769.

The spelling of 788221 in words is "seven hundred eighty-eight thousand, two hundred twenty-one".