78981824 has 28 divisors (see below), whose sum is σ = 159306768. Its totient is φ = 38841600.

The previous prime is 78981823. The next prime is 78981857. The reversal of 78981824 is 42818987.

It is not an unprimeable number, because it can be changed into a prime (78981821) 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 in 3 ways as a sum of consecutive naturals, for example, 6212 + ... + 14019.

Almost surely, 2^78981824 is an apocalyptic number.

It is an amenable number.

78981824 is an abundant number, since it is smaller than the sum of its proper divisors (80324944).

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

78981824 is a wasteful number, since it uses less digits than its factorization.

78981824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20304 (or 20294 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 78981824 is about 8887.1718786125. The cubic root of 78981824 is about 429.0511328724.

The spelling of 78981824 in words is "seventy-eight million, nine hundred eighty-one thousand, eight hundred twenty-four".