28800734511 has 4 divisors (see below), whose sum is σ = 38400979352. Its totient is φ = 19200489672.

The previous prime is 28800734507. The next prime is 28800734513. The reversal of 28800734511 is 11543700882.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28800734511 - 2² = 28800734507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28800734511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28800734513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4800122416 + ... + 4800122421.

It is an arithmetic number, because the mean of its divisors is an integer number (9600244838).

Almost surely, 2^28800734511 is an apocalyptic number.

28800734511 is a deficient number, since it is larger than the sum of its proper divisors (9600244841).

28800734511 is an equidigital number, since it uses as much as digits as its factorization.

28800734511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9600244840.

The product of its (nonzero) digits is 53760, while the sum is 39.

The spelling of 28800734511 in words is "twenty-eight billion, eight hundred million, seven hundred thirty-four thousand, five hundred eleven".