789721506 has 48 divisors (see below), whose sum is σ = 1959869184. Its totient is φ = 225130752.

The previous prime is 789721501. The next prime is 789721507. The reversal of 789721506 is 605127987.

789721506 is a `hidden beast` number, since 78 + 9 + 72 + 1 + 506 = 666.

It is not an unprimeable number, because it can be changed into a prime (789721501) 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 23 ways as a sum of consecutive naturals, for example, 51570 + ... + 65106.

It is an arithmetic number, because the mean of its divisors is an integer number (40830608).

Almost surely, 2^789721506 is an apocalyptic number.

789721506 is an abundant number, since it is smaller than the sum of its proper divisors (1170147678).

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

789721506 is a wasteful number, since it uses less digits than its factorization.

789721506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14015 (or 14012 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 789721506 is about 28101.9840224850. The cubic root of 789721506 is about 924.3249054177.

It can be divided in two parts, 7897 and 21506, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 789721506 in words is "seven hundred eighty-nine million, seven hundred twenty-one thousand, five hundred six".