685503620 has 24 divisors (see below), whose sum is σ = 1485996288. Its totient is φ = 265356000.

The previous prime is 685503613. The next prime is 685503629. The reversal of 685503620 is 26305586.

685503620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (685503629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552206 + ... + 553445.

It is an arithmetic number, because the mean of its divisors is an integer number (61916512).

Almost surely, 2^685503620 is an apocalyptic number.

It is an amenable number.

685503620 is an abundant number, since it is smaller than the sum of its proper divisors (800492668).

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

685503620 is a wasteful number, since it uses less digits than its factorization.

685503620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105691 (or 1105689 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 685503620 is about 26182.1240544002. The cubic root of 685503620 is about 881.7319626424.

The spelling of 685503620 in words is "six hundred eighty-five million, five hundred three thousand, six hundred twenty".