68778844 has 24 divisors (see below), whose sum is σ = 124573680. Its totient is φ = 33204864.

The previous prime is 68778817. The next prime is 68778877. The reversal of 68778844 is 44887786.

It is a junction number, because it is equal to n+sod(n) for n = 68778791 and 68778800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13062 + ... + 17554.

It is an arithmetic number, because the mean of its divisors is an integer number (5190570).

Almost surely, 2^68778844 is an apocalyptic number.

It is an amenable number.

68778844 is a deficient number, since it is larger than the sum of its proper divisors (55794836).

68778844 is a wasteful number, since it uses less digits than its factorization.

68778844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629 (or 4627 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 52.

The square root of 68778844 is about 8293.3011521348. The cubic root of 68778844 is about 409.7179182058.

The spelling of 68778844 in words is "sixty-eight million, seven hundred seventy-eight thousand, eight hundred forty-four".