68811984 has 40 divisors (see below), whose sum is σ = 197517120. Its totient is φ = 22937184.

The previous prime is 68811973. The next prime is 68811989. The reversal of 68811984 is 48911886.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68811989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79212 + ... + 80075.

It is an arithmetic number, because the mean of its divisors is an integer number (4937928).

Almost surely, 2^68811984 is an apocalyptic number.

It is an amenable number.

68811984 is an abundant number, since it is smaller than the sum of its proper divisors (128705136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68811984 is a wasteful number, since it uses less digits than its factorization.

68811984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159304 (or 159292 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 68811984 is about 8295.2989096235. The cubic root of 68811984 is about 409.7837130094.

The spelling of 68811984 in words is "sixty-eight million, eight hundred eleven thousand, nine hundred eighty-four".