78445888 has 28 divisors (see below), whose sum is σ = 164825172. Its totient is φ = 36915200.

The previous prime is 78445877. The next prime is 78445897. The reversal of 78445888 is 88854487.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36869184 + 41576704 = 6072^2 + 6448^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 34963 + ... + 37138.

Almost surely, 2^78445888 is an apocalyptic number.

It is an amenable number.

78445888 is an abundant number, since it is smaller than the sum of its proper divisors (86379284).

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

78445888 is a wasteful number, since it uses less digits than its factorization.

78445888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72130 (or 72120 counting only the distinct ones).

The product of its digits is 2293760, while the sum is 52.

The square root of 78445888 is about 8856.9683300777. The cubic root of 78445888 is about 428.0784786362.

The spelling of 78445888 in words is "seventy-eight million, four hundred forty-five thousand, eight hundred eighty-eight".