68945184 has 144 divisors (see below), whose sum is σ = 244520640. Its totient is φ = 17902080.

The previous prime is 68945159. The next prime is 68945203. The reversal of 68945184 is 48154986.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20622 + ... + 23730.

It is an arithmetic number, because the mean of its divisors is an integer number (1698060).

Almost surely, 2^68945184 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 68945184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122260320).

68945184 is an abundant number, since it is smaller than the sum of its proper divisors (175575456).

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

68945184 is a wasteful number, since it uses less digits than its factorization.

68945184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143 (or 3132 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 68945184 is about 8303.3236718798. The cubic root of 68945184 is about 410.0479499740.

The spelling of 68945184 in words is "sixty-eight million, nine hundred forty-five thousand, one hundred eighty-four".