685072448 has 14 divisors (see below), whose sum is σ = 1359440766. Its totient is φ = 342536192.

The previous prime is 685072439. The next prime is 685072459. The reversal of 685072448 is 844270586.

It can be written as a sum of positive squares in only one way, i.e., 639482944 + 45589504 = 25288^2 + 6752^2 .

It is a junction number, because it is equal to n+sod(n) for n = 685072399 and 685072408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5352065 + ... + 5352192.

Almost surely, 2^685072448 is an apocalyptic number.

It is an amenable number.

685072448 is a deficient number, since it is larger than the sum of its proper divisors (674368318).

685072448 is a wasteful number, since it uses less digits than its factorization.

685072448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10704269 (or 10704259 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 44.

The square root of 685072448 is about 26173.8886679072. Note that the first 3 decimals coincide. The cubic root of 685072448 is about 881.5470582600.

The spelling of 685072448 in words is "six hundred eighty-five million, seventy-two thousand, four hundred forty-eight".