67881384 has 96 divisors (see below), whose sum is σ = 191711520. Its totient is φ = 21679488.

The previous prime is 67881383. The next prime is 67881389. The reversal of 67881384 is 48318876.

It is not an unprimeable number, because it can be changed into a prime (67881383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220959 + ... + 221265.

It is an arithmetic number, because the mean of its divisors is an integer number (1996995).

Almost surely, 2^67881384 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 67881384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95855760).

67881384 is an abundant number, since it is smaller than the sum of its proper divisors (123830136).

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

67881384 is a wasteful number, since it uses less digits than its factorization.

67881384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 432 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 67881384 is about 8239.0159606594. The cubic root of 67881384 is about 407.9280438271.

It can be divided in two parts, 67881 and 384, that added together give a triangular number (68265 = T₃₆₉).

The spelling of 67881384 in words is "sixty-seven million, eight hundred eighty-one thousand, three hundred eighty-four".