685772528 has 40 divisors (see below), whose sum is σ = 1539901440. Its totient is φ = 289759680.

The previous prime is 685772473. The next prime is 685772533. The reversal of 685772528 is 825277586.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35168 + ... + 51071.

It is an arithmetic number, because the mean of its divisors is an integer number (38497536).

Almost surely, 2^685772528 is an apocalyptic number.

It is an amenable number.

685772528 is an abundant number, since it is smaller than the sum of its proper divisors (854128912).

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

685772528 is a wasteful number, since it uses less digits than its factorization.

685772528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86325 (or 86319 counting only the distinct ones).

The product of its digits is 1881600, while the sum is 50.

The square root of 685772528 is about 26187.2588867182. The cubic root of 685772528 is about 881.8472422582.

The spelling of 685772528 in words is "six hundred eighty-five million, seven hundred seventy-two thousand, five hundred twenty-eight".