28791254129 has 12 divisors (see below), whose sum is σ = 31666989312. Its totient is φ = 26156991960.

The previous prime is 28791254113. The next prime is 28791254147. The reversal of 28791254129 is 92145219782.

It is not a de Polignac number, because 28791254129 - 2⁴ = 28791254113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28791254029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113684 + ... + 265530.

It is an arithmetic number, because the mean of its divisors is an integer number (2638915776).

Almost surely, 2^28791254129 is an apocalyptic number.

It is an amenable number.

28791254129 is a deficient number, since it is larger than the sum of its proper divisors (2875735183).

28791254129 is a wasteful number, since it uses less digits than its factorization.

28791254129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153436 (or 153425 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The spelling of 28791254129 in words is "twenty-eight billion, seven hundred ninety-one million, two hundred fifty-four thousand, one hundred twenty-nine".