68716388 has 48 divisors (see below), whose sum is σ = 137497920. Its totient is φ = 29787264.

The previous prime is 68716381. The next prime is 68716391. The reversal of 68716388 is 88361786.

It is not an unprimeable number, because it can be changed into a prime (68716381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154895 + ... + 155337.

It is an arithmetic number, because the mean of its divisors is an integer number (2864540).

Almost surely, 2^68716388 is an apocalyptic number.

It is an amenable number.

68716388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

68716388 is a wasteful number, since it uses less digits than its factorization.

68716388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 634 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 68716388 is about 8289.5348482288. The cubic root of 68716388 is about 409.5938631410.

The spelling of 68716388 in words is "sixty-eight million, seven hundred sixteen thousand, three hundred eighty-eight".