68286778 has 16 divisors (see below), whose sum is σ = 117345024. Its totient is φ = 29195280.

The previous prime is 68286721. The next prime is 68286797. The reversal of 68286778 is 87768286.

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, 376 + ... + 11692.

It is an arithmetic number, because the mean of its divisors is an integer number (7334064).

Almost surely, 2^68286778 is an apocalyptic number.

68286778 is a deficient number, since it is larger than the sum of its proper divisors (49058246).

68286778 is a wasteful number, since it uses less digits than its factorization.

68286778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11757.

The product of its digits is 1806336, while the sum is 52.

The square root of 68286778 is about 8263.5814269601. The cubic root of 68286778 is about 408.7384941288.

The spelling of 68286778 in words is "sixty-eight million, two hundred eighty-six thousand, seven hundred seventy-eight".