78552252 has 18 divisors (see below), whose sum is σ = 198562728. Its totient is φ = 26184072.

The previous prime is 78552247. The next prime is 78552259. The reversal of 78552252 is 25225587.

78552252 is a `hidden beast` number, since 7 + 85 + 522 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2182007 = 78552252 / (7 + 8 + 5 + 5 + 2 + 2 + 5 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78552259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1090968 + ... + 1091039.

Almost surely, 2^78552252 is an apocalyptic number.

It is an amenable number.

78552252 is an abundant number, since it is smaller than the sum of its proper divisors (120010476).

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

78552252 is a wasteful number, since it uses less digits than its factorization.

78552252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182017 (or 2182012 counting only the distinct ones).

The product of its digits is 56000, while the sum is 36.

The square root of 78552252 is about 8862.9708337555. The cubic root of 78552252 is about 428.2718670431.

The spelling of 78552252 in words is "seventy-eight million, five hundred fifty-two thousand, two hundred fifty-two".