28880711 has 4 divisors (see below), whose sum is σ = 28919424. Its totient is φ = 28842000.

The previous prime is 28880699. The next prime is 28880729. The reversal of 28880711 is 11708882.

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

It is a cyclic number.

It is not a de Polignac number, because 28880711 - 2¹⁰ = 28879687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28880611) 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, 18215 + ... + 19736.

It is an arithmetic number, because the mean of its divisors is an integer number (7229856).

Almost surely, 2^28880711 is an apocalyptic number.

28880711 is a deficient number, since it is larger than the sum of its proper divisors (38713).

28880711 is an equidigital number, since it uses as much as digits as its factorization.

28880711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38712.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 28880711 is about 5374.0776883108. The cubic root of 28880711 is about 306.8098466299.

The spelling of 28880711 in words is "twenty-eight million, eight hundred eighty thousand, seven hundred eleven".