78839223 has 8 divisors (see below), whose sum is σ = 105648000. Its totient is φ = 52294968.

The previous prime is 78839219. The next prime is 78839237. The reversal of 78839223 is 32293887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78839223 - 2² = 78839219 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78839213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65433 + ... + 66626.

It is an arithmetic number, because the mean of its divisors is an integer number (13206000).

Almost surely, 2^78839223 is an apocalyptic number.

78839223 is a deficient number, since it is larger than the sum of its proper divisors (26808777).

78839223 is a wasteful number, since it uses less digits than its factorization.

78839223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132261.

The product of its digits is 145152, while the sum is 42.

The square root of 78839223 is about 8879.1453980662. The cubic root of 78839223 is about 428.7927612778.

The spelling of 78839223 in words is "seventy-eight million, eight hundred thirty-nine thousand, two hundred twenty-three".