78028216 has 16 divisors (see below), whose sum is σ = 167203440. Its totient is φ = 33440640.

The previous prime is 78028201. The next prime is 78028229. The reversal of 78028216 is 61282087.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696625 + ... + 696736.

It is an arithmetic number, because the mean of its divisors is an integer number (10450215).

Almost surely, 2^78028216 is an apocalyptic number.

It is an amenable number.

78028216 is an abundant number, since it is smaller than the sum of its proper divisors (89175224).

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

78028216 is a wasteful number, since it uses less digits than its factorization.

78028216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393374 (or 1393370 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 78028216 is about 8833.3581383300. The cubic root of 78028216 is about 427.3173821883.

The spelling of 78028216 in words is "seventy-eight million, twenty-eight thousand, two hundred sixteen".