68979128 has 8 divisors (see below), whose sum is σ = 129335880. Its totient is φ = 34489560.

The previous prime is 68979121. The next prime is 68979143. The reversal of 68979128 is 82197986.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68979121) 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 as a sum of consecutive naturals, namely, 4311188 + ... + 4311203.

It is an arithmetic number, because the mean of its divisors is an integer number (16166985).

Almost surely, 2^68979128 is an apocalyptic number.

It is an amenable number.

68979128 is a deficient number, since it is larger than the sum of its proper divisors (60356752).

68979128 is a wasteful number, since it uses less digits than its factorization.

68979128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8622397 (or 8622393 counting only the distinct ones).

The product of its digits is 435456, while the sum is 50.

The square root of 68979128 is about 8305.3674211320. The cubic root of 68979128 is about 410.1152323338.

The spelling of 68979128 in words is "sixty-eight million, nine hundred seventy-nine thousand, one hundred twenty-eight".