685328355 has 48 divisors (see below), whose sum is σ = 1242686016. Its totient is φ = 348733440.

The previous prime is 685328353. The next prime is 685328381. The reversal of 685328355 is 553823586.

685328355 is a `hidden beast` number, since 68 + 532 + 8 + 3 + 55 = 666.

It is not a de Polignac number, because 685328355 - 2¹ = 685328353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 685328355.

It is not an unprimeable number, because it can be changed into a prime (685328353) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 662919 + ... + 663951.

It is an arithmetic number, because the mean of its divisors is an integer number (25889292).

Almost surely, 2^685328355 is an apocalyptic number.

685328355 is a deficient number, since it is larger than the sum of its proper divisors (557357661).

685328355 is a wasteful number, since it uses less digits than its factorization.

685328355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708 (or 1705 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 685328355 is about 26178.7768048853. The cubic root of 685328355 is about 881.6568111187.

The spelling of 685328355 in words is "six hundred eighty-five million, three hundred twenty-eight thousand, three hundred fifty-five".