685772120 has 32 divisors (see below), whose sum is σ = 1683259920. Its totient is φ = 249371520.

The previous prime is 685772107. The next prime is 685772161. The reversal of 685772120 is 21277586.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778847 + ... + 779726.

Almost surely, 2^685772120 is an apocalyptic number.

It is an amenable number.

685772120 is an abundant number, since it is smaller than the sum of its proper divisors (997487800).

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

685772120 is a wasteful number, since it uses less digits than its factorization.

685772120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558595 (or 1558591 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 685772120 is about 26187.2510966692. The cubic root of 685772120 is about 881.8470673733.

The spelling of 685772120 in words is "six hundred eighty-five million, seven hundred seventy-two thousand, one hundred twenty".