78425216 has 64 divisors (see below), whose sum is σ = 172730880. Its totient is φ = 35278848.

The previous prime is 78425203. The next prime is 78425227. The reversal of 78425216 is 61252487.

It is a tau number, because it is divible by the number of its divisors (64).

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, 49265 + ... + 50831.

It is an arithmetic number, because the mean of its divisors is an integer number (2698920).

Almost surely, 2^78425216 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 78425216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86365440).

78425216 is an abundant number, since it is smaller than the sum of its proper divisors (94305664).

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

78425216 is a wasteful number, since it uses less digits than its factorization.

78425216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621 (or 1609 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 78425216 is about 8855.8012624494. The cubic root of 78425216 is about 428.0408730291.

The spelling of 78425216 in words is "seventy-eight million, four hundred twenty-five thousand, two hundred sixteen".