78052218 has 8 divisors (see below), whose sum is σ = 156104448. Its totient is φ = 26017404.

The previous prime is 78052213. The next prime is 78052231. The reversal of 78052218 is 81225087.

It is a sphenic number, since it is the product of 3 distinct primes.

78052218 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (78052211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6504346 + ... + 6504357.

It is an arithmetic number, because the mean of its divisors is an integer number (19513056).

Almost surely, 2^78052218 is an apocalyptic number.

78052218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78052218 is a wasteful number, since it uses less digits than its factorization.

78052218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13008708.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 78052218 is about 8834.7166338259. The cubic root of 78052218 is about 427.3611929227.

The spelling of 78052218 in words is "seventy-eight million, fifty-two thousand, two hundred eighteen".