78449246 has 4 divisors (see below), whose sum is σ = 117673872. Its totient is φ = 39224622.

The previous prime is 78449227. The next prime is 78449257. The reversal of 78449246 is 64294487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64294487 = 283 ⋅227189.

It is a junction number, because it is equal to n+sod(n) for n = 78449197 and 78449206.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 19612310 + ... + 19612313.

It is an arithmetic number, because the mean of its divisors is an integer number (29418468).

Almost surely, 2^78449246 is an apocalyptic number.

78449246 is a deficient number, since it is larger than the sum of its proper divisors (39224626).

78449246 is a wasteful number, since it uses less digits than its factorization.

78449246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39224625.

The product of its digits is 387072, while the sum is 44.

The square root of 78449246 is about 8857.1578963006. The cubic root of 78449246 is about 428.0845867406.

The spelling of 78449246 in words is "seventy-eight million, four hundred forty-nine thousand, two hundred forty-six".