78855285 has 16 divisors (see below), whose sum is σ = 126449856. Its totient is φ = 41962368.

The previous prime is 78855241. The next prime is 78855307. The reversal of 78855285 is 58255887.

It is a happy number.

It is not a de Polignac number, because 78855285 - 2⁶ = 78855221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1377 + ... + 12633.

It is an arithmetic number, because the mean of its divisors is an integer number (7903116).

Almost surely, 2^78855285 is an apocalyptic number.

It is an amenable number.

78855285 is a deficient number, since it is larger than the sum of its proper divisors (47594571).

78855285 is a wasteful number, since it uses less digits than its factorization.

78855285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11732.

The product of its digits is 896000, while the sum is 48.

The square root of 78855285 is about 8880.0498309413. The cubic root of 78855285 is about 428.8218787712.

The spelling of 78855285 in words is "seventy-eight million, eight hundred fifty-five thousand, two hundred eighty-five".