78020228 has 24 divisors (see below), whose sum is σ = 160406400. Its totient is φ = 32735520.

The previous prime is 78020221. The next prime is 78020233. The reversal of 78020228 is 82202087.

It is a self number, because there is not a number n which added to its sum of digits gives 78020228.

It is not an unprimeable number, because it can be changed into a prime (78020221) 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 7 ways as a sum of consecutive naturals, for example, 67628 + ... + 68771.

It is an arithmetic number, because the mean of its divisors is an integer number (6683600).

Almost surely, 2^78020228 is an apocalyptic number.

It is an amenable number.

78020228 is an abundant number, since it is smaller than the sum of its proper divisors (82386172).

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

78020228 is a wasteful number, since it uses less digits than its factorization.

78020228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136427 (or 136425 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 78020228 is about 8832.9059770836. The cubic root of 78020228 is about 427.3027997381.

The spelling of 78020228 in words is "seventy-eight million, twenty thousand, two hundred twenty-eight".