68169984 has 72 divisors (see below), whose sum is σ = 186412800. Its totient is φ = 22099968.

The previous prime is 68169979. The next prime is 68169991. The reversal of 68169984 is 48996186.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27217 + ... + 29615.

Almost surely, 2^68169984 is an apocalyptic number.

68169984 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68169984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93206400).

68169984 is an abundant number, since it is smaller than the sum of its proper divisors (118242816).

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

68169984 is a wasteful number, since it uses less digits than its factorization.

68169984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455 (or 2441 counting only the distinct ones).

The product of its digits is 746496, while the sum is 51.

The square root of 68169984 is about 8256.5116120551. The cubic root of 68169984 is about 408.5053331019.

The spelling of 68169984 in words is "sixty-eight million, one hundred sixty-nine thousand, nine hundred eighty-four".