78864222 has 16 divisors (see below), whose sum is σ = 158531472. Its totient is φ = 26154240.

The previous prime is 78864221. The next prime is 78864223. The reversal of 78864222 is 22246887.

78864222 is nontrivially palindromic in base 14.

It is an interprime number because it is at equal distance from previous prime (78864221) and next prime (78864223).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78864221) 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 7 ways as a sum of consecutive naturals, for example, 32179 + ... + 34542.

It is an arithmetic number, because the mean of its divisors is an integer number (9908217).

Almost surely, 2^78864222 is an apocalyptic number.

78864222 is an abundant number, since it is smaller than the sum of its proper divisors (79667250).

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

78864222 is a wasteful number, since it uses less digits than its factorization.

78864222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66923.

The product of its digits is 86016, while the sum is 39.

The square root of 78864222 is about 8880.5530233201. The cubic root of 78864222 is about 428.8380782196.

The spelling of 78864222 in words is "seventy-eight million, eight hundred sixty-four thousand, two hundred twenty-two".