28827911 has 4 divisors (see below), whose sum is σ = 32946192. Its totient is φ = 24709632.

The previous prime is 28827907. The next prime is 28827913. The reversal of 28827911 is 11972882.

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 28827911 - 2² = 28827907 is a prime.

It is a super-3 number, since 3×28827911³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28827913) 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, 2059130 + ... + 2059143.

It is an arithmetic number, because the mean of its divisors is an integer number (8236548).

Almost surely, 2^28827911 is an apocalyptic number.

28827911 is a deficient number, since it is larger than the sum of its proper divisors (4118281).

28827911 is an equidigital number, since it uses as much as digits as its factorization.

28827911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118280.

The product of its digits is 16128, while the sum is 38.

The square root of 28827911 is about 5369.1629701472. The cubic root of 28827911 is about 306.6227616466.

The spelling of 28827911 in words is "twenty-eight million, eight hundred twenty-seven thousand, nine hundred eleven".