68688570 has 32 divisors (see below), whose sum is σ = 165102912. Its totient is φ = 18289152.

The previous prime is 68688563. The next prime is 68688577. The reversal of 68688570 is 7588686.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68688563) and next prime (68688577).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (68688577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25194 + ... + 27786.

It is an arithmetic number, because the mean of its divisors is an integer number (5159466).

Almost surely, 2^68688570 is an apocalyptic number.

68688570 is an abundant number, since it is smaller than the sum of its proper divisors (96414342).

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

68688570 is a wasteful number, since it uses less digits than its factorization.

68688570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486.

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 68688570 is about 8287.8567796506. The cubic root of 68688570 is about 409.5385846245.

The spelling of 68688570 in words is "sixty-eight million, six hundred eighty-eight thousand, five hundred seventy".