68721360 has 80 divisors (see below), whose sum is σ = 214004160. Its totient is φ = 18242560.

The previous prime is 68721313. The next prime is 68721383. The reversal of 68721360 is 6312786.

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

It is a super-3 number, since 3×68721360³ (a number of 24 digits) contains 333 as substring.

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, 66931 + ... + 67949.

It is an arithmetic number, because the mean of its divisors is an integer number (2675052).

Almost surely, 2^68721360 is an apocalyptic number.

68721360 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 68721360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107002080).

68721360 is an abundant number, since it is smaller than the sum of its proper divisors (145282800).

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

68721360 is a wasteful number, since it uses less digits than its factorization.

68721360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 68721360 is about 8289.8347390041. The cubic root of 68721360 is about 409.6037416752.

The spelling of 68721360 in words is "sixty-eight million, seven hundred twenty-one thousand, three hundred sixty".