78384443 has 4 divisors (see below), whose sum is σ = 82509960. Its totient is φ = 74258928.

The previous prime is 78384431. The next prime is 78384457. The reversal of 78384443 is 34448387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34448387 = 19 ⋅1813073.

It is a cyclic number.

It is not a de Polignac number, because 78384443 - 2⁶ = 78384379 is a prime.

It is a super-2 number, since 2×78384443² = 12288241808840498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78384443.

It is not an unprimeable number, because it can be changed into a prime (78384043) 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, 2062730 + ... + 2062767.

It is an arithmetic number, because the mean of its divisors is an integer number (20627490).

Almost surely, 2^78384443 is an apocalyptic number.

78384443 is a deficient number, since it is larger than the sum of its proper divisors (4125517).

78384443 is a wasteful number, since it uses less digits than its factorization.

78384443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125516.

The product of its digits is 258048, while the sum is 41.

The square root of 78384443 is about 8853.4989128593. The cubic root of 78384443 is about 427.9666811778.

The spelling of 78384443 in words is "seventy-eight million, three hundred eighty-four thousand, four hundred forty-three".