68784388 has 12 divisors (see below), whose sum is σ = 123308892. Its totient is φ = 33553280.

The previous prime is 68784377. The next prime is 68784413. The reversal of 68784388 is 88348786.

It can be written as a sum of positive squares in 2 ways, for example, as 6563844 + 62220544 = 2562^2 + 7888^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209545 + ... + 209872.

It is an arithmetic number, because the mean of its divisors is an integer number (10275741).

Almost surely, 2^68784388 is an apocalyptic number.

It is an amenable number.

68784388 is a deficient number, since it is larger than the sum of its proper divisors (54524504).

68784388 is a wasteful number, since it uses less digits than its factorization.

68784388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419462 (or 419460 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 52.

The square root of 68784388 is about 8293.6353910695. The cubic root of 68784388 is about 409.7289265090.

The spelling of 68784388 in words is "sixty-eight million, seven hundred eighty-four thousand, three hundred eighty-eight".