28900911 has 16 divisors (see below), whose sum is σ = 42384384. Its totient is φ = 17405664.

The previous prime is 28900889. The next prime is 28900913. The reversal of 28900911 is 11900982.

It is not a de Polignac number, because 28900911 - 2¹³ = 28892719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28900913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6051 + ... + 9716.

It is an arithmetic number, because the mean of its divisors is an integer number (2649024).

Almost surely, 2^28900911 is an apocalyptic number.

28900911 is a deficient number, since it is larger than the sum of its proper divisors (13483473).

28900911 is a wasteful number, since it uses less digits than its factorization.

28900911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15830.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 28900911 is about 5375.9567520582. The cubic root of 28900911 is about 306.8813605035.

The spelling of 28900911 in words is "twenty-eight million, nine hundred thousand, nine hundred eleven".