78449319 has 12 divisors (see below), whose sum is σ = 122032456. Its totient is φ = 48276432.

The previous prime is 78449311. The next prime is 78449323. The reversal of 78449319 is 91394487.

It is not a de Polignac number, because 78449319 - 2³ = 78449311 is a prime.

It is a super-2 number, since 2×78449319² = 12308591303127522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78449311) 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 11 ways as a sum of consecutive naturals, for example, 335137 + ... + 335370.

Almost surely, 2^78449319 is an apocalyptic number.

78449319 is a deficient number, since it is larger than the sum of its proper divisors (43583137).

78449319 is a wasteful number, since it uses less digits than its factorization.

78449319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670526 (or 670523 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 78449319 is about 8857.1620172604. The cubic root of 78449319 is about 428.0847195236.

The spelling of 78449319 in words is "seventy-eight million, four hundred forty-nine thousand, three hundred nineteen".