685297552 has 10 divisors (see below), whose sum is σ = 1327764038. Its totient is φ = 342648768.

The previous prime is 685297541. The next prime is 685297577. The reversal of 685297552 is 255792586.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 633226896 + 52070656 = 25164^2 + 7216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 685297496 and 685297505.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21415533 + ... + 21415564.

Almost surely, 2^685297552 is an apocalyptic number.

It is an amenable number.

685297552 is a deficient number, since it is larger than the sum of its proper divisors (642466486).

685297552 is a wasteful number, since it uses less digits than its factorization.

685297552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42831105 (or 42831099 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 49.

The square root of 685297552 is about 26178.1884781969. The cubic root of 685297552 is about 881.6436018391.

The spelling of 685297552 in words is "six hundred eighty-five million, two hundred ninety-seven thousand, five hundred fifty-two".