685297248 has 24 divisors (see below), whose sum is σ = 1798905528. Its totient is φ = 228432384.

The previous prime is 685297211. The next prime is 685297273. The reversal of 685297248 is 842792586.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 685297248.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3569161 + ... + 3569352.

It is an arithmetic number, because the mean of its divisors is an integer number (74954397).

Almost surely, 2^685297248 is an apocalyptic number.

It is an amenable number.

685297248 is an abundant number, since it is smaller than the sum of its proper divisors (1113608280).

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

685297248 is a wasteful number, since it uses less digits than its factorization.

685297248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7138526 (or 7138518 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 685297248 is about 26178.1826718357. The cubic root of 685297248 is about 881.6434714725.

The spelling of 685297248 in words is "six hundred eighty-five million, two hundred ninety-seven thousand, two hundred forty-eight".