685326452 has 18 divisors (see below), whose sum is σ = 1204384818. Its totient is φ = 341222512.

The previous prime is 685326431. The next prime is 685326461. The reversal of 685326452 is 254623586.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 585446416 + 99880036 = 24196^2 + 9994^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 275438 + ... + 277914.

Almost surely, 2^685326452 is an apocalyptic number.

It is an amenable number.

685326452 is a deficient number, since it is larger than the sum of its proper divisors (519058366).

685326452 is a wasteful number, since it uses less digits than its factorization.

685326452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3007 (or 2742 counting only the distinct ones).

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

The square root of 685326452 is about 26178.7404586241. The cubic root of 685326452 is about 881.6559950649.

The spelling of 685326452 in words is "six hundred eighty-five million, three hundred twenty-six thousand, four hundred fifty-two".