76780443 has 6 divisors (see below), whose sum is σ = 102394164. Its totient is φ = 51176844.

The previous prime is 76780433. The next prime is 76780477. The reversal of 76780443 is 34408767.

It is a happy number.

It is not a de Polignac number, because 76780443 - 2⁴ = 76780427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76780433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12648 + ... + 17706.

It is an arithmetic number, because the mean of its divisors is an integer number (17065694).

Almost surely, 2^76780443 is an apocalyptic number.

76780443 is a deficient number, since it is larger than the sum of its proper divisors (25613721).

76780443 is an frugal number, since it uses more digits than its factorization.

76780443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10121 (or 5062 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 76780443 is about 8762.4450354910. The cubic root of 76780443 is about 425.0273440308.

The spelling of 76780443 in words is "seventy-six million, seven hundred eighty thousand, four hundred forty-three".