68488320 has 64 divisors (see below), whose sum is σ = 218312640. Its totient is φ = 18263040.

The previous prime is 68488313. The next prime is 68488333. The reversal of 68488320 is 2388486.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15916 + ... + 19755.

It is an arithmetic number, because the mean of its divisors is an integer number (3411135).

Almost surely, 2^68488320 is an apocalyptic number.

68488320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68488320 is an abundant number, since it is smaller than the sum of its proper divisors (149824320).

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

68488320 is a wasteful number, since it uses less digits than its factorization.

68488320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35693 (or 35681 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 68488320 is about 8275.7670339371. The cubic root of 68488320 is about 409.1402169074.

The spelling of 68488320 in words is "sixty-eight million, four hundred eighty-eight thousand, three hundred twenty".