78538824 has 96 divisors (see below), whose sum is σ = 261817920. Its totient is φ = 20711808.

The previous prime is 78538783. The next prime is 78538843. The reversal of 78538824 is 42883587.

It is a self number, because there is not a number n which added to its sum of digits gives 78538824.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 559 + ... + 12545.

It is an arithmetic number, because the mean of its divisors is an integer number (2727270).

Almost surely, 2^78538824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78538824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130908960).

78538824 is an abundant number, since it is smaller than the sum of its proper divisors (183279096).

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

78538824 is a wasteful number, since it uses less digits than its factorization.

78538824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12019 (or 12012 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 78538824 is about 8862.2132675760. The cubic root of 78538824 is about 428.2474622162.

The spelling of 78538824 in words is "seventy-eight million, five hundred thirty-eight thousand, eight hundred twenty-four".