78765441 has 4 divisors (see below), whose sum is σ = 105020592. Its totient is φ = 52510292.

The previous prime is 78765433. The next prime is 78765443. The reversal of 78765441 is 14456787.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78765441 - 2³ = 78765433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78765393 and 78765402.

It is not an unprimeable number, because it can be changed into a prime (78765443) 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 3 ways as a sum of consecutive naturals, for example, 13127571 + ... + 13127576.

It is an arithmetic number, because the mean of its divisors is an integer number (26255148).

Almost surely, 2^78765441 is an apocalyptic number.

It is an amenable number.

78765441 is a deficient number, since it is larger than the sum of its proper divisors (26255151).

78765441 is a wasteful number, since it uses less digits than its factorization.

78765441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26255150.

The product of its digits is 188160, while the sum is 42.

The square root of 78765441 is about 8874.9896337968. The cubic root of 78765441 is about 428.6589570591.

The spelling of 78765441 in words is "seventy-eight million, seven hundred sixty-five thousand, four hundred forty-one".