788721 has 8 divisors (see below), whose sum is σ = 1056480. Its totient is φ = 523392.

The previous prime is 788719. The next prime is 788761. The reversal of 788721 is 127887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 788721 - 2¹ = 788719 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 788721.

It is not an unprimeable number, because it can be changed into a prime (788701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385 + ... + 1313.

It is an arithmetic number, because the mean of its divisors is an integer number (132060).

2⁷⁸⁸⁷²¹ is an apocalyptic number.

It is an amenable number.

788721 is a deficient number, since it is larger than the sum of its proper divisors (267759).

788721 is a wasteful number, since it uses less digits than its factorization.

788721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215.

The product of its digits is 6272, while the sum is 33.

The square root of 788721 is about 888.0996565701. The cubic root of 788721 is about 92.3934394997.

The spelling of 788721 in words is "seven hundred eighty-eight thousand, seven hundred twenty-one".