28911241779 has 16 divisors (see below), whose sum is σ = 44217799680. Its totient is φ = 16459744320.

The previous prime is 28911241721. The next prime is 28911241829. The reversal of 28911241779 is 97714211982.

It is not a de Polignac number, because 28911241779 - 2¹² = 28911237683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28911242779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2534394 + ... + 2545775.

It is an arithmetic number, because the mean of its divisors is an integer number (2763612480).

Almost surely, 2^28911241779 is an apocalyptic number.

28911241779 is a deficient number, since it is larger than the sum of its proper divisors (15306557901).

28911241779 is a wasteful number, since it uses less digits than its factorization.

28911241779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080450.

The product of its digits is 508032, while the sum is 51.

It can be divided in two parts, 289112 and 41779, that added together give a triangular number (330891 = T₈₁₃).

The spelling of 28911241779 in words is "twenty-eight billion, nine hundred eleven million, two hundred forty-one thousand, seven hundred seventy-nine".