686584740 has 24 divisors (see below), whose sum is σ = 1922437440. Its totient is φ = 183089248.

The previous prime is 686584739. The next prime is 686584747. The reversal of 686584740 is 47485686.

686584740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 686584740.

It is not an unprimeable number, because it can be changed into a prime (686584747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5721480 + ... + 5721599.

It is an arithmetic number, because the mean of its divisors is an integer number (80101560).

Almost surely, 2^686584740 is an apocalyptic number.

686584740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686584740 is an abundant number, since it is smaller than the sum of its proper divisors (1235852700).

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

686584740 is a wasteful number, since it uses less digits than its factorization.

686584740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11443091 (or 11443089 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 686584740 is about 26202.7620681485. The cubic root of 686584740 is about 882.1952509154.

The spelling of 686584740 in words is "six hundred eighty-six million, five hundred eighty-four thousand, seven hundred forty".