68391776 has 12 divisors (see below), whose sum is σ = 134646372. Its totient is φ = 34195872.

The previous prime is 68391769. The next prime is 68391779. The reversal of 68391776 is 67719386.

It is a self number, because there is not a number n which added to its sum of digits gives 68391776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68391779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1068590 + ... + 1068653.

It is an arithmetic number, because the mean of its divisors is an integer number (11220531).

Almost surely, 2^68391776 is an apocalyptic number.

It is an amenable number.

68391776 is a deficient number, since it is larger than the sum of its proper divisors (66254596).

68391776 is a wasteful number, since it uses less digits than its factorization.

68391776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137253 (or 2137245 counting only the distinct ones).

The product of its digits is 381024, while the sum is 47.

The square root of 68391776 is about 8269.9320432516. The cubic root of 68391776 is about 408.9478794502.

The spelling of 68391776 in words is "sixty-eight million, three hundred ninety-one thousand, seven hundred seventy-six".