68899720 has 32 divisors (see below), whose sum is σ = 161766720. Its totient is φ = 26361280.

The previous prime is 68899709. The next prime is 68899739. The reversal of 68899720 is 2799886.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36526 + ... + 38365.

It is an arithmetic number, because the mean of its divisors is an integer number (5055210).

Almost surely, 2^68899720 is an apocalyptic number.

It is an amenable number.

68899720 is an abundant number, since it is smaller than the sum of its proper divisors (92867000).

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

68899720 is a wasteful number, since it uses less digits than its factorization.

68899720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74925 (or 74921 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 68899720 is about 8300.5855215159. The cubic root of 68899720 is about 409.9577985514.

The spelling of 68899720 in words is "sixty-eight million, eight hundred ninety-nine thousand, seven hundred twenty".