78044459 has 4 divisors (see below), whose sum is σ = 78131040. Its totient is φ = 77957880.

The previous prime is 78044431. The next prime is 78044471. The reversal of 78044459 is 95444087.

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 78044459 - 2⁸ = 78044203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78044479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41924 + ... + 43745.

It is an arithmetic number, because the mean of its divisors is an integer number (19532760).

Almost surely, 2^78044459 is an apocalyptic number.

78044459 is a deficient number, since it is larger than the sum of its proper divisors (86581).

78044459 is an equidigital number, since it uses as much as digits as its factorization.

78044459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86580.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 78044459 is about 8834.2775029993. The cubic root of 78044459 is about 427.3470314401.

The spelling of 78044459 in words is "seventy-eight million, forty-four thousand, four hundred fifty-nine".