78822224 has 20 divisors (see below), whose sum is σ = 164466036. Its totient is φ = 36379392.

The previous prime is 78822223. The next prime is 78822229. The reversal of 78822224 is 42222887.

It can be written as a sum of positive squares in 2 ways, for example, as 15460624 + 63361600 = 3932^2 + 7960^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78822223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189269 + ... + 189684.

Almost surely, 2^78822224 is an apocalyptic number.

It is an amenable number.

78822224 is an abundant number, since it is smaller than the sum of its proper divisors (85643812).

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

78822224 is a wasteful number, since it uses less digits than its factorization.

78822224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378974 (or 378968 counting only the distinct ones).

The product of its digits is 28672, while the sum is 35.

The square root of 78822224 is about 8878.1881034364. The cubic root of 78822224 is about 428.7619408654.

The spelling of 78822224 in words is "seventy-eight million, eight hundred twenty-two thousand, two hundred twenty-four".