28788078841 has 4 divisors (see below), whose sum is σ = 28789315072. Its totient is φ = 28786842612.

The previous prime is 28788078827. The next prime is 28788078853. The reversal of 28788078841 is 14887088782.

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 28788078841 - 2⁷ = 28788078713 is a prime.

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 28788078841.

It is not an unprimeable number, because it can be changed into a prime (28788078811) 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, 582501 + ... + 629986.

It is an arithmetic number, because the mean of its divisors is an integer number (7197328768).

Almost surely, 2^28788078841 is an apocalyptic number.

It is an amenable number.

28788078841 is a deficient number, since it is larger than the sum of its proper divisors (1236231).

28788078841 is a wasteful number, since it uses less digits than its factorization.

28788078841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236230.

The product of its (nonzero) digits is 12845056, while the sum is 61.

The spelling of 28788078841 in words is "twenty-eight billion, seven hundred eighty-eight million, seventy-eight thousand, eight hundred forty-one".