684074940 has 24 divisors (see below), whose sum is σ = 1915410000. Its totient is φ = 182419968.

The previous prime is 684074933. The next prime is 684074957. The reversal of 684074940 is 49470486.

684074940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 684074892 and 684074901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5700565 + ... + 5700684.

It is an arithmetic number, because the mean of its divisors is an integer number (79808750).

Almost surely, 2^684074940 is an apocalyptic number.

684074940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

684074940 is an abundant number, since it is smaller than the sum of its proper divisors (1231335060).

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

684074940 is a wasteful number, since it uses less digits than its factorization.

684074940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11401261 (or 11401259 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 684074940 is about 26154.8263232620. The cubic root of 684074940 is about 881.1189880185.

The spelling of 684074940 in words is "six hundred eighty-four million, seventy-four thousand, nine hundred forty".