78788912 has 40 divisors (see below), whose sum is σ = 156656640. Its totient is φ = 38376000.

The previous prime is 78788909. The next prime is 78788917. The reversal of 78788912 is 21988787.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78788917) 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 7 ways as a sum of consecutive naturals, for example, 104537 + ... + 105287.

It is an arithmetic number, because the mean of its divisors is an integer number (3916416).

Almost surely, 2^78788912 is an apocalyptic number.

It is an amenable number.

78788912 is a deficient number, since it is larger than the sum of its proper divisors (77867728).

78788912 is a wasteful number, since it uses less digits than its factorization.

78788912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 915 counting only the distinct ones).

The product of its digits is 451584, while the sum is 50.

The square root of 78788912 is about 8876.3118467075. The cubic root of 78788912 is about 428.7015309556.

The spelling of 78788912 in words is "seventy-eight million, seven hundred eighty-eight thousand, nine hundred twelve".