68448720 has 80 divisors (see below), whose sum is σ = 213111360. Its totient is φ = 18173952.

The previous prime is 68448707. The next prime is 68448739. The reversal of 68448720 is 2784486.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73216 + ... + 74144.

It is an arithmetic number, because the mean of its divisors is an integer number (2663892).

Almost surely, 2^68448720 is an apocalyptic number.

68448720 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 68448720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106555680).

68448720 is an abundant number, since it is smaller than the sum of its proper divisors (144662640).

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

68448720 is a wasteful number, since it uses less digits than its factorization.

68448720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 68448720 is about 8273.3741605224. The cubic root of 68448720 is about 409.0613466404.

The spelling of 68448720 in words is "sixty-eight million, four hundred forty-eight thousand, seven hundred twenty".