78825285 has 64 divisors (see below), whose sum is σ = 174735360. Its totient is φ = 32754240.

The previous prime is 78825283. The next prime is 78825289. The reversal of 78825285 is 58252887.

It is not a de Polignac number, because 78825285 - 2¹ = 78825283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 78825285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78825283) 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 63 ways as a sum of consecutive naturals, for example, 6604 + ... + 14186.

It is an arithmetic number, because the mean of its divisors is an integer number (2730240).

Almost surely, 2^78825285 is an apocalyptic number.

It is an amenable number.

78825285 is an abundant number, since it is smaller than the sum of its proper divisors (95910075).

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

78825285 is a wasteful number, since it uses less digits than its factorization.

78825285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7615 (or 7609 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 78825285 is about 8878.3604905410. The cubic root of 78825285 is about 428.7674910062.

The spelling of 78825285 in words is "seventy-eight million, eight hundred twenty-five thousand, two hundred eighty-five".