68821888 has 64 divisors (see below), whose sum is σ = 145141920. Its totient is φ = 32440320.

The previous prime is 68821873. The next prime is 68821889. The reversal of 68821888 is 88812886.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68821889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285448 + ... + 285688.

Almost surely, 2^68821888 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 68821888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72570960).

68821888 is an abundant number, since it is smaller than the sum of its proper divisors (76320032).

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

68821888 is a wasteful number, since it uses less digits than its factorization.

68821888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 363 counting only the distinct ones).

The product of its digits is 393216, while the sum is 49.

The square root of 68821888 is about 8295.8958527696. The cubic root of 68821888 is about 409.8033719068.

The spelling of 68821888 in words is "sixty-eight million, eight hundred twenty-one thousand, eight hundred eighty-eight".