68135900 has 144 divisors (see below), whose sum is σ = 183321600. Its totient is φ = 21461760.

The previous prime is 68135897. The next prime is 68135933. The reversal of 68135900 is 953186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 625046 + ... + 625154.

Almost surely, 2^68135900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68135900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91660800).

68135900 is an abundant number, since it is smaller than the sum of its proper divisors (115185700).

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

68135900 is a wasteful number, since it uses less digits than its factorization.

68135900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 68135900 is about 8254.4472861604. The cubic root of 68135900 is about 408.4372395114.

The spelling of 68135900 in words is "sixty-eight million, one hundred thirty-five thousand, nine hundred".