78824212 has 6 divisors (see below), whose sum is σ = 137942378. Its totient is φ = 39412104.

The previous prime is 78824191. The next prime is 78824219. The reversal of 78824212 is 21242887.

It can be written as a sum of positive squares in only one way, i.e., 41809156 + 37015056 = 6466^2 + 6084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78824219) 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 as a sum of consecutive naturals, namely, 9853023 + ... + 9853030.

Almost surely, 2^78824212 is an apocalyptic number.

It is an amenable number.

78824212 is a deficient number, since it is larger than the sum of its proper divisors (59118166).

78824212 is a wasteful number, since it uses less digits than its factorization.

78824212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19706057 (or 19706055 counting only the distinct ones).

The product of its digits is 14336, while the sum is 34.

The square root of 78824212 is about 8878.3000625120. The cubic root of 78824212 is about 428.7655454815.

The spelling of 78824212 in words is "seventy-eight million, eight hundred twenty-four thousand, two hundred twelve".