68708990 has 32 divisors (see below), whose sum is σ = 141640704. Its totient is φ = 23508000.

The previous prime is 68708957. The next prime is 68708999. The reversal of 68708990 is 9980786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68708999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51917 + ... + 53223.

It is an arithmetic number, because the mean of its divisors is an integer number (4426272).

Almost surely, 2^68708990 is an apocalyptic number.

68708990 is an abundant number, since it is smaller than the sum of its proper divisors (72931714).

68708990 is a wasteful number, since it uses less digits than its factorization.

68708990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 68708990 is about 8289.0886109391. The cubic root of 68708990 is about 409.5791636676.

The spelling of 68708990 in words is "sixty-eight million, seven hundred eight thousand, nine hundred ninety".