78905344 has 76 divisors (see below), whose sum is σ = 184549024. Its totient is φ = 33030144.

The previous prime is 78905303. The next prime is 78905363. The reversal of 78905344 is 44350987.

It is a junction number, because it is equal to n+sod(n) for n = 78905297 and 78905306.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1834987 + ... + 1835029.

Almost surely, 2^78905344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78905344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92274512).

78905344 is an abundant number, since it is smaller than the sum of its proper divisors (105643680).

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

78905344 is an frugal number, since it uses more digits than its factorization.

78905344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 78905344 is about 8882.8680053235. The cubic root of 78905344 is about 428.9126013042.

The spelling of 78905344 in words is "seventy-eight million, nine hundred five thousand, three hundred forty-four".