28820467918 has 16 divisors (see below), whose sum is σ = 47236976640. Its totient is φ = 13079043000.

The previous prime is 28820467909. The next prime is 28820467919. The reversal of 28820467918 is 81976402882.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28820467919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1044558 + ... + 1071793.

It is an arithmetic number, because the mean of its divisors is an integer number (2952311040).

Almost surely, 2^28820467918 is an apocalyptic number.

28820467918 is a deficient number, since it is larger than the sum of its proper divisors (18416508722).

28820467918 is a wasteful number, since it uses less digits than its factorization.

28820467918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116983.

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 28820467918 in words is "twenty-eight billion, eight hundred twenty million, four hundred sixty-seven thousand, nine hundred eighteen".