68890142 has 8 divisors (see below), whose sum is σ = 105285096. Its totient is φ = 33795112.

The previous prime is 68890141. The next prime is 68890163. The reversal of 68890142 is 24109886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 68890096 and 68890105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68890141) 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 3 ways as a sum of consecutive naturals, for example, 324848 + ... + 325059.

It is an arithmetic number, because the mean of its divisors is an integer number (13160637).

Almost surely, 2^68890142 is an apocalyptic number.

68890142 is a deficient number, since it is larger than the sum of its proper divisors (36394954).

68890142 is a wasteful number, since it uses less digits than its factorization.

68890142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649962.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 68890142 is about 8300.0085542125. The cubic root of 68890142 is about 409.9388010976.

The spelling of 68890142 in words is "sixty-eight million, eight hundred ninety thousand, one hundred forty-two".