68721700 has 36 divisors (see below), whose sum is σ = 155615040. Its totient is φ = 26292640.

The previous prime is 68721671. The next prime is 68721721. The reversal of 68721700 is 712786.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12640 + ... + 17239.

It is an arithmetic number, because the mean of its divisors is an integer number (4322640).

Almost surely, 2^68721700 is an apocalyptic number.

It is an amenable number.

68721700 is an abundant number, since it is smaller than the sum of its proper divisors (86893340).

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

68721700 is a wasteful number, since it uses less digits than its factorization.

68721700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29916 (or 29909 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 68721700 is about 8289.8552460221. The cubic root of 68721700 is about 409.6044171811.

The spelling of 68721700 in words is "sixty-eight million, seven hundred twenty-one thousand, seven hundred".