68651280 has 160 divisors (see below), whose sum is σ = 243139200. Its totient is φ = 17791488.

The previous prime is 68651273. The next prime is 68651299. The reversal of 68651280 is 8215686.

It is a happy number.

68651280 is a `hidden beast` number, since 68 + 6 + 512 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79491 + ... + 80349.

It is an arithmetic number, because the mean of its divisors is an integer number (1519620).

Almost surely, 2^68651280 is an apocalyptic number.

68651280 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 68651280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121569600).

68651280 is an abundant number, since it is smaller than the sum of its proper divisors (174487920).

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

68651280 is a wasteful number, since it uses less digits than its factorization.

68651280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 906 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 68651280 is about 8285.6067973323. The cubic root of 68651280 is about 409.4644604131.

The spelling of 68651280 in words is "sixty-eight million, six hundred fifty-one thousand, two hundred eighty".