68135380 has 24 divisors (see below), whose sum is σ = 143337600. Its totient is φ = 27205920.

The previous prime is 68135377. The next prime is 68135401. The reversal of 68135380 is 8353186.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9921 + ... + 15319.

It is an arithmetic number, because the mean of its divisors is an integer number (5972400).

Almost surely, 2^68135380 is an apocalyptic number.

It is an amenable number.

68135380 is an abundant number, since it is smaller than the sum of its proper divisors (75202220).

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

68135380 is a wasteful number, since it uses less digits than its factorization.

68135380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6039 (or 6037 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 68135380 is about 8254.4157879283. The cubic root of 68135380 is about 408.4362004707.

The spelling of 68135380 in words is "sixty-eight million, one hundred thirty-five thousand, three hundred eighty".