67989888 has 128 divisors (see below), whose sum is σ = 203673600. Its totient is φ = 22325760.

The previous prime is 67989881. The next prime is 67989893. The reversal of 67989888 is 88898976.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67989881) 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, 355873 + ... + 356063.

It is an arithmetic number, because the mean of its divisors is an integer number (1591200).

Almost surely, 2^67989888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67989888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101836800).

67989888 is an abundant number, since it is smaller than the sum of its proper divisors (135683712).

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

67989888 is a wasteful number, since it uses less digits than its factorization.

67989888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 299 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 63.

The square root of 67989888 is about 8245.5980983795. The cubic root of 67989888 is about 408.1452769847.

The spelling of 67989888 in words is "sixty-seven million, nine hundred eighty-nine thousand, eight hundred eighty-eight".