78428204 has 12 divisors (see below), whose sum is σ = 137587800. Its totient is φ = 39117408.

The previous prime is 78428201. The next prime is 78428237. The reversal of 78428204 is 40282487.

It is not an unprimeable number, because it can be changed into a prime (78428201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22334 + ... + 25605.

It is an arithmetic number, because the mean of its divisors is an integer number (11465650).

Almost surely, 2^78428204 is an apocalyptic number.

It is an amenable number.

78428204 is a deficient number, since it is larger than the sum of its proper divisors (59159596).

78428204 is a wasteful number, since it uses less digits than its factorization.

78428204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48352 (or 48350 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 78428204 is about 8855.9699638154. The cubic root of 78428204 is about 428.0463090778.

The spelling of 78428204 in words is "seventy-eight million, four hundred twenty-eight thousand, two hundred four".