78855344 has 20 divisors (see below), whose sum is σ = 153334680. Its totient is φ = 39285120.

The previous prime is 78855313. The next prime is 78855347. The reversal of 78855344 is 44355887.

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

It is a junction number, because it is equal to n+sod(n) for n = 78855295 and 78855304.

It is not an unprimeable number, because it can be changed into a prime (78855347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4274 + ... + 13265.

It is an arithmetic number, because the mean of its divisors is an integer number (7666734).

Almost surely, 2^78855344 is an apocalyptic number.

It is an amenable number.

78855344 is a deficient number, since it is larger than the sum of its proper divisors (74479336).

78855344 is a wasteful number, since it uses less digits than its factorization.

78855344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17828 (or 17822 counting only the distinct ones).

The product of its digits is 537600, while the sum is 44.

The square root of 78855344 is about 8880.0531529941. The cubic root of 78855344 is about 428.8219857202.

The spelling of 78855344 in words is "seventy-eight million, eight hundred fifty-five thousand, three hundred forty-four".