68009984 has 60 divisors (see below), whose sum is σ = 155708784. Its totient is φ = 29097984.

The previous prime is 68009983. The next prime is 68009993. The reversal of 68009984 is 48990086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68009983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114392 + ... + 114984.

Almost surely, 2^68009984 is an apocalyptic number.

68009984 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 68009984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77854392).

68009984 is an abundant number, since it is smaller than the sum of its proper divisors (87698800).

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

68009984 is an frugal number, since it uses more digits than its factorization.

68009984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 68009984 is about 8246.8165979364. The cubic root of 68009984 is about 408.1854853144.

The spelling of 68009984 in words is "sixty-eight million, nine thousand, nine hundred eighty-four".