28811511296 has 20 divisors (see below), whose sum is σ = 57566751132. Its totient is φ = 14405755392.

The previous prime is 28811511293. The next prime is 28811511299. The reversal of 28811511296 is 69211511882.

It is an interprime number because it is at equal distance from previous prime (28811511293) and next prime (28811511299).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28811511293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28135730 + ... + 28136753.

Almost surely, 2^28811511296 is an apocalyptic number.

It is an amenable number.

28811511296 is a deficient number, since it is larger than the sum of its proper divisors (28755239836).

28811511296 is an frugal number, since it uses more digits than its factorization.

28811511296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56272501 (or 56272485 counting only the distinct ones).

The product of its digits is 69120, while the sum is 44.

The spelling of 28811511296 in words is "twenty-eight billion, eight hundred eleven million, five hundred eleven thousand, two hundred ninety-six".