68900720 has 80 divisors (see below), whose sum is σ = 186172608. Its totient is φ = 23224320.

The previous prime is 68900701. The next prime is 68900761. The reversal of 68900720 is 2700986.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 33152 + ... + 35168.

Almost surely, 2^68900720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68900720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93086304).

68900720 is an abundant number, since it is smaller than the sum of its proper divisors (117271888).

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

68900720 is a wasteful number, since it uses less digits than its factorization.

68900720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098 (or 2092 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 68900720 is about 8300.6457580118. The cubic root of 68900720 is about 409.9597818968.

The spelling of 68900720 in words is "sixty-eight million, nine hundred thousand, seven hundred twenty".