28798400979 has 12 divisors (see below), whose sum is σ = 44044613496. Its totient is φ = 18069584832.

The previous prime is 28798400977. The next prime is 28798401083. The reversal of 28798400979 is 97900489782.

It is not a de Polignac number, because 28798400979 - 2¹ = 28798400977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28798400977) 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, 94112269 + ... + 94112574.

It is an arithmetic number, because the mean of its divisors is an integer number (3670384458).

Almost surely, 2^28798400979 is an apocalyptic number.

28798400979 is a deficient number, since it is larger than the sum of its proper divisors (15246212517).

28798400979 is a wasteful number, since it uses less digits than its factorization.

28798400979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188224866 (or 188224863 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 28798400979 in words is "twenty-eight billion, seven hundred ninety-eight million, four hundred thousand, nine hundred seventy-nine".