28047768743 has 4 divisors (see below), whose sum is σ = 28252497120. Its totient is φ = 27843040368.

The previous prime is 28047768719. The next prime is 28047768757. The reversal of 28047768743 is 34786774082.

It is a happy number.

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 28047768743 - 2²⁰ = 28046720167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28047768773) 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, 102363983 + ... + 102364256.

It is an arithmetic number, because the mean of its divisors is an integer number (7063124280).

Almost surely, 2^28047768743 is an apocalyptic number.

28047768743 is a deficient number, since it is larger than the sum of its proper divisors (204728377).

28047768743 is a wasteful number, since it uses less digits than its factorization.

28047768743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204728376.

The product of its (nonzero) digits is 12644352, while the sum is 56.

The spelling of 28047768743 in words is "twenty-eight billion, forty-seven million, seven hundred sixty-eight thousand, seven hundred forty-three".