78449673 has 16 divisors (see below), whose sum is σ = 108250560. Its totient is φ = 50502144.

The previous prime is 78449671. The next prime is 78449677. The reversal of 78449673 is 37694487.

It is a happy number.

It is not a de Polignac number, because 78449673 - 2¹ = 78449671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78449671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8065 + ... + 14897.

It is an arithmetic number, because the mean of its divisors is an integer number (6765660).

Almost surely, 2^78449673 is an apocalyptic number.

It is an amenable number.

78449673 is a deficient number, since it is larger than the sum of its proper divisors (29800887).

78449673 is a wasteful number, since it uses less digits than its factorization.

78449673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6968.

The product of its digits is 1016064, while the sum is 48.

The square root of 78449673 is about 8857.1820010656. The cubic root of 78449673 is about 428.0853634287.

The spelling of 78449673 in words is "seventy-eight million, four hundred forty-nine thousand, six hundred seventy-three".