68520288 has 24 divisors (see below), whose sum is σ = 179866008. Its totient is φ = 22840064.

The previous prime is 68520281. The next prime is 68520293. The reversal of 68520288 is 88202586.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68520281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356781 + ... + 356972.

It is an arithmetic number, because the mean of its divisors is an integer number (7494417).

Almost surely, 2^68520288 is an apocalyptic number.

It is an amenable number.

68520288 is an abundant number, since it is smaller than the sum of its proper divisors (111345720).

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

68520288 is a wasteful number, since it uses less digits than its factorization.

68520288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713766 (or 713758 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 68520288 is about 8277.6982307886. The cubic root of 68520288 is about 409.2038645482.

The spelling of 68520288 in words is "sixty-eight million, five hundred twenty thousand, two hundred eighty-eight".