78428108 has 24 divisors (see below), whose sum is σ = 149990400. Its totient is φ = 35586320.

The previous prime is 78428083. The next prime is 78428113. The reversal of 78428108 is 80182487.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31493 + ... + 33891.

It is an arithmetic number, because the mean of its divisors is an integer number (6249600).

Almost surely, 2^78428108 is an apocalyptic number.

It is an amenable number.

78428108 is a deficient number, since it is larger than the sum of its proper divisors (71562292).

78428108 is a wasteful number, since it uses less digits than its factorization.

78428108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157 (or 3155 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 78428108 is about 8855.9645437411. The cubic root of 78428108 is about 428.0461344278.

The spelling of 78428108 in words is "seventy-eight million, four hundred twenty-eight thousand, one hundred eight".