68840278 has 16 divisors (see below), whose sum is σ = 112192416. Its totient is φ = 31489920.

The previous prime is 68840267. The next prime is 68840309. The reversal of 68840278 is 87204886.

It is a super-3 number, since 3×68840278³ (a number of 24 digits) contains 333 as substring.

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, 8778 + ... + 14653.

It is an arithmetic number, because the mean of its divisors is an integer number (7012026).

Almost surely, 2^68840278 is an apocalyptic number.

68840278 is a deficient number, since it is larger than the sum of its proper divisors (43352138).

68840278 is a wasteful number, since it uses less digits than its factorization.

68840278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23559.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 68840278 is about 8297.0041581284. The cubic root of 68840278 is about 409.8398700475.

The spelling of 68840278 in words is "sixty-eight million, eight hundred forty thousand, two hundred seventy-eight".