68910720 has 128 divisors (see below), whose sum is σ = 231336000. Its totient is φ = 17399808.

The previous prime is 68910719. The next prime is 68910727. The reversal of 68910720 is 2701986.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (68910727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35536 + ... + 37424.

Almost surely, 2^68910720 is an apocalyptic number.

68910720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68910720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115668000).

68910720 is an abundant number, since it is smaller than the sum of its proper divisors (162425280).

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

68910720 is a wasteful number, since it uses less digits than its factorization.

68910720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930 (or 1918 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 68910720 is about 8301.2480989307. The cubic root of 68910720 is about 409.9796142948.

The spelling of 68910720 in words is "sixty-eight million, nine hundred ten thousand, seven hundred twenty".