685764252 has 24 divisors (see below), whose sum is σ = 1777907600. Its totient is φ = 228588048.

The previous prime is 685764227. The next prime is 685764269. The reversal of 685764252 is 252467586.

It is a super-3 number, since 3×685764252³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 685764198 and 685764207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3174727 + ... + 3174942.

Almost surely, 2^685764252 is an apocalyptic number.

It is an amenable number.

685764252 is an abundant number, since it is smaller than the sum of its proper divisors (1092143348).

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

685764252 is a wasteful number, since it uses less digits than its factorization.

685764252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6349682 (or 6349674 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 685764252 is about 26187.1008704667. The cubic root of 685764252 is about 881.8436948248.

The spelling of 685764252 in words is "six hundred eighty-five million, seven hundred sixty-four thousand, two hundred fifty-two".