78944028 has 12 divisors (see below), whose sum is σ = 184202760. Its totient is φ = 26314672.

The previous prime is 78943987. The next prime is 78944029. The reversal of 78944028 is 82044987.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78944029) 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, 3289323 + ... + 3289346.

It is an arithmetic number, because the mean of its divisors is an integer number (15350230).

Almost surely, 2^78944028 is an apocalyptic number.

It is an amenable number.

78944028 is an abundant number, since it is smaller than the sum of its proper divisors (105258732).

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

78944028 is a wasteful number, since it uses less digits than its factorization.

78944028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6578676 (or 6578674 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 78944028 is about 8885.0451884051. The cubic root of 78944028 is about 428.9826825074.

The spelling of 78944028 in words is "seventy-eight million, nine hundred forty-four thousand, twenty-eight".