78425288 has 36 divisors (see below), whose sum is σ = 153463185. Its totient is φ = 37572000.

The previous prime is 78425261. The next prime is 78425317. The reversal of 78425288 is 88252487.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 54434884 + 23990404 = 7378^2 + 4898^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6262.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 776438 + ... + 776538.

Almost surely, 2^78425288 is an apocalyptic number.

It is an amenable number.

78425288 is a deficient number, since it is larger than the sum of its proper divisors (75037897).

78425288 is a wasteful number, since it uses less digits than its factorization.

78425288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 134 counting only the distinct ones).

The product of its digits is 286720, while the sum is 44.

The square root of 78425288 is about 8855.8053275803. The cubic root of 78425288 is about 428.0410040198.

The spelling of 78425288 in words is "seventy-eight million, four hundred twenty-five thousand, two hundred eighty-eight".