788391 has 12 divisors (see below), whose sum is σ = 1146600. Its totient is φ = 522000.

The previous prime is 788387. The next prime is 788393. The reversal of 788391 is 193887.

788391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 788391 - 2² = 788387 is a prime.

788391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (788393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2085 + ... + 2433.

It is an arithmetic number, because the mean of its divisors is an integer number (95550).

2⁷⁸⁸³⁹¹ is an apocalyptic number.

788391 is a deficient number, since it is larger than the sum of its proper divisors (358209).

788391 is a wasteful number, since it uses less digits than its factorization.

788391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 603 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 788391 is about 887.9138471721. The cubic root of 788391 is about 92.3805519310.

The spelling of 788391 in words is "seven hundred eighty-eight thousand, three hundred ninety-one".