785528729 has 8 divisors (see below), whose sum is σ = 820292352. Its totient is φ = 750816000.

The previous prime is 785528669. The next prime is 785528749. The reversal of 785528729 is 927825587.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 785528729 - 2²⁴ = 768751513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (785528749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20729 + ... + 44729.

It is an arithmetic number, because the mean of its divisors is an integer number (102536544).

Almost surely, 2^785528729 is an apocalyptic number.

It is an amenable number.

785528729 is a deficient number, since it is larger than the sum of its proper divisors (34763623).

785528729 is a wasteful number, since it uses less digits than its factorization.

785528729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25447.

The product of its digits is 2822400, while the sum is 53.

The square root of 785528729 is about 28027.2854375874. The cubic root of 785528729 is about 922.6861981703.

The spelling of 785528729 in words is "seven hundred eighty-five million, five hundred twenty-eight thousand, seven hundred twenty-nine".