685793980 has 48 divisors (see below), whose sum is σ = 1521828000. Its totient is φ = 258875136.

The previous prime is 685793959. The next prime is 685793987. The reversal of 685793980 is 89397586.

It is a happy number.

It is a super-3 number, since 3×685793980³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685793987) 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 15 ways as a sum of consecutive naturals, for example, 98866 + ... + 105574.

It is an arithmetic number, because the mean of its divisors is an integer number (31704750).

Almost surely, 2^685793980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685793980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (760914000).

685793980 is an abundant number, since it is smaller than the sum of its proper divisors (836034020).

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

685793980 is a wasteful number, since it uses less digits than its factorization.

685793980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7006 (or 7004 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 685793980 is about 26187.6684720118. The cubic root of 685793980 is about 881.8564373333.

The spelling of 685793980 in words is "six hundred eighty-five million, seven hundred ninety-three thousand, nine hundred eighty".