68428560 has 40 divisors (see below), whose sum is σ = 212129280. Its totient is φ = 18247552.

The previous prime is 68428531. The next prime is 68428561. The reversal of 68428560 is 6582486.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (68428561) by changing a digit.

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, 142320 + ... + 142799.

It is an arithmetic number, because the mean of its divisors is an integer number (5303232).

Almost surely, 2^68428560 is an apocalyptic number.

68428560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68428560 is an abundant number, since it is smaller than the sum of its proper divisors (143700720).

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

68428560 is a wasteful number, since it uses less digits than its factorization.

68428560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285135 (or 285129 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 68428560 is about 8272.1557045307. The cubic root of 68428560 is about 409.0211828190.

The spelling of 68428560 in words is "sixty-eight million, four hundred twenty-eight thousand, five hundred sixty".