68915280 has 320 divisors, whose sum is σ = 274268160. Its totient is φ = 13934592.

The previous prime is 68915279. The next prime is 68915309. The reversal of 68915280 is 8251986.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 542577 + ... + 542703.

It is an arithmetic number, because the mean of its divisors is an integer number (857088).

Almost surely, 2^68915280 is an apocalyptic number.

68915280 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 68915280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137134080).

68915280 is an abundant number, since it is smaller than the sum of its proper divisors (205352880).

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

68915280 is a wasteful number, since it uses less digits than its factorization.

68915280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 68915280 is about 8301.5227518811. The cubic root of 68915280 is about 409.9886572313.

The spelling of 68915280 in words is "sixty-eight million, nine hundred fifteen thousand, two hundred eighty".