785528731 has 6 divisors (see below), whose sum is σ = 850602300. Its totient is φ = 725103288.

The previous prime is 785528669. The next prime is 785528749. The reversal of 785528731 is 137825587.

It is not a de Polignac number, because 785528731 - 2⁷ = 785528603 is a prime.

It is a super-2 number, since 2×785528731² = 1234110774452940722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (785520731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2323881 + ... + 2324218.

It is an arithmetic number, because the mean of its divisors is an integer number (141767050).

Almost surely, 2^785528731 is an apocalyptic number.

785528731 is a deficient number, since it is larger than the sum of its proper divisors (65073569).

785528731 is a wasteful number, since it uses less digits than its factorization.

785528731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4648125 (or 4648112 counting only the distinct ones).

The product of its digits is 470400, while the sum is 46.

The square root of 785528731 is about 28027.2854732669. The cubic root of 785528731 is about 922.6861989534.

The spelling of 785528731 in words is "seven hundred eighty-five million, five hundred twenty-eight thousand, seven hundred thirty-one".