68889764 has 6 divisors (see below), whose sum is σ = 120557094. Its totient is φ = 34444880.

The previous prime is 68889749. The next prime is 68889773. The reversal of 68889764 is 46798886.

It can be written as a sum of positive squares in only one way, i.e., 39816100 + 29073664 = 6310^2 + 5392^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8611217 + ... + 8611224.

It is an arithmetic number, because the mean of its divisors is an integer number (20092849).

Almost surely, 2^68889764 is an apocalyptic number.

It is an amenable number.

68889764 is a deficient number, since it is larger than the sum of its proper divisors (51667330).

68889764 is a wasteful number, since it uses less digits than its factorization.

68889764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17222445 (or 17222443 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 56.

The square root of 68889764 is about 8299.9857831204. The cubic root of 68889764 is about 409.9380513185.

The spelling of 68889764 in words is "sixty-eight million, eight hundred eighty-nine thousand, seven hundred sixty-four".