685635224 has 32 divisors (see below), whose sum is σ = 1310072400. Its totient is φ = 336307200.

The previous prime is 685635217. The next prime is 685635229. The reversal of 685635224 is 422536586.

It is a happy number.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685635229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282464 + ... + 284880.

Almost surely, 2^685635224 is an apocalyptic number.

It is an amenable number.

685635224 is a deficient number, since it is larger than the sum of its proper divisors (624437176).

685635224 is a wasteful number, since it uses less digits than its factorization.

685635224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083 (or 3079 counting only the distinct ones).

The product of its digits is 345600, while the sum is 41.

The square root of 685635224 is about 26184.6371752598. The cubic root of 685635224 is about 881.7883844345.

The spelling of 685635224 in words is "six hundred eighty-five million, six hundred thirty-five thousand, two hundred twenty-four".