78444273 has 16 divisors (see below), whose sum is σ = 111338496. Its totient is φ = 48956160.

The previous prime is 78444263. The next prime is 78444281. The reversal of 78444273 is 37244487.

It is not a de Polignac number, because 78444273 - 2⁶ = 78444209 is a prime.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (78444253) 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, 5715 + ... + 13767.

It is an arithmetic number, because the mean of its divisors is an integer number (6958656).

Almost surely, 2^78444273 is an apocalyptic number.

It is an amenable number.

78444273 is a deficient number, since it is larger than the sum of its proper divisors (32894223).

78444273 is a wasteful number, since it uses less digits than its factorization.

78444273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8264.

The product of its digits is 150528, while the sum is 39.

The square root of 78444273 is about 8856.8771584572. The cubic root of 78444273 is about 428.0755409361.

The spelling of 78444273 in words is "seventy-eight million, four hundred forty-four thousand, two hundred seventy-three".