67878018 has 48 divisors (see below), whose sum is σ = 159921216. Its totient is φ = 20682720.

The previous prime is 67877989. The next prime is 67878047. The reversal of 67878018 is 81087876.

It is an interprime number because it is at equal distance from previous prime (67877989) and next prime (67878047).

It is an unprimeable number.

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, 23683 + ... + 26393.

It is an arithmetic number, because the mean of its divisors is an integer number (3331692).

Almost surely, 2^67878018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67878018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79960608).

67878018 is an abundant number, since it is smaller than the sum of its proper divisors (92043198).

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

67878018 is a wasteful number, since it uses less digits than its factorization.

67878018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839 (or 2836 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 67878018 is about 8238.8116861596. The cubic root of 67878018 is about 407.9213011414.

The spelling of 67878018 in words is "sixty-seven million, eight hundred seventy-eight thousand, eighteen".