684061960 has 32 divisors (see below), whose sum is σ = 1562117760. Its totient is φ = 269539776.

The previous prime is 684061949. The next prime is 684061967. The reversal of 684061960 is 69160486.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (684061967) 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 7 ways as a sum of consecutive naturals, for example, 124944 + ... + 130303.

It is an arithmetic number, because the mean of its divisors is an integer number (48816180).

Almost surely, 2^684061960 is an apocalyptic number.

It is an amenable number.

684061960 is an abundant number, since it is smaller than the sum of its proper divisors (878055800).

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

684061960 is a wasteful number, since it uses less digits than its factorization.

684061960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255325 (or 255321 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 684061960 is about 26154.5781843256. The cubic root of 684061960 is about 881.1134150439.

The spelling of 684061960 in words is "six hundred eighty-four million, sixty-one thousand, nine hundred sixty".