78444403 has 4 divisors (see below), whose sum is σ = 80564560. Its totient is φ = 76324248.

The previous prime is 78444389. The next prime is 78444433. The reversal of 78444403 is 30444487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78444403 - 2⁵ = 78444371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78444433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060023 + ... + 1060096.

It is an arithmetic number, because the mean of its divisors is an integer number (20141140).

Almost surely, 2^78444403 is an apocalyptic number.

78444403 is a deficient number, since it is larger than the sum of its proper divisors (2120157).

78444403 is a wasteful number, since it uses less digits than its factorization.

78444403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120156.

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 78444403 is about 8856.8844973839. The cubic root of 78444403 is about 428.0757774088.

The spelling of 78444403 in words is "seventy-eight million, four hundred forty-four thousand, four hundred three".