685453836 has 24 divisors (see below), whose sum is σ = 1609583920. Its totient is φ = 227028672.

The previous prime is 685453801. The next prime is 685453837. The reversal of 685453836 is 638354586.

It is a super-2 number, since 2×685453836² = 939693922574229792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (685453837) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 180031 + ... + 183798.

Almost surely, 2^685453836 is an apocalyptic number.

It is an amenable number.

685453836 is an abundant number, since it is smaller than the sum of its proper divisors (924130084).

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

685453836 is a wasteful number, since it uses less digits than its factorization.

685453836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363993 (or 363991 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 48.

The square root of 685453836 is about 26181.1733121340. The cubic root of 685453836 is about 881.7106171647.

The spelling of 685453836 in words is "six hundred eighty-five million, four hundred fifty-three thousand, eight hundred thirty-six".