78578252 has 12 divisors (see below), whose sum is σ = 138010320. Its totient is φ = 39146736.

The previous prime is 78578251. The next prime is 78578257. The reversal of 78578252 is 25287587.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78578251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34352 + ... + 36567.

It is an arithmetic number, because the mean of its divisors is an integer number (11500860).

Almost surely, 2^78578252 is an apocalyptic number.

It is an amenable number.

78578252 is a deficient number, since it is larger than the sum of its proper divisors (59432068).

78578252 is a wasteful number, since it uses less digits than its factorization.

78578252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71200 (or 71198 counting only the distinct ones).

The product of its digits is 313600, while the sum is 44.

The square root of 78578252 is about 8864.4374892037. The cubic root of 78578252 is about 428.3191130480.

The spelling of 78578252 in words is "seventy-eight million, five hundred seventy-eight thousand, two hundred fifty-two".