78788256 has 24 divisors (see below), whose sum is σ = 206819424. Its totient is φ = 26262720.

The previous prime is 78788249. The next prime is 78788257. The reversal of 78788256 is 65288787.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 78788199 and 78788208.

It is not an unprimeable number, because it can be changed into a prime (78788257) 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, 410260 + ... + 410451.

It is an arithmetic number, because the mean of its divisors is an integer number (8617476).

Almost surely, 2^78788256 is an apocalyptic number.

It is an amenable number.

78788256 is an abundant number, since it is smaller than the sum of its proper divisors (128031168).

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

78788256 is a wasteful number, since it uses less digits than its factorization.

78788256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820724 (or 820716 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 51.

The square root of 78788256 is about 8876.2748943462. The cubic root of 78788256 is about 428.7003411562.

The spelling of 78788256 in words is "seventy-eight million, seven hundred eighty-eight thousand, two hundred fifty-six".