28469111 has 4 divisors (see below), whose sum is σ = 31057224. Its totient is φ = 25881000.

The previous prime is 28469099. The next prime is 28469117. The reversal of 28469111 is 11196482.

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 28469111 - 2²² = 24274807 is a prime.

It is a super-3 number, since 3×28469111³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28469117) 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, 1294040 + ... + 1294061.

It is an arithmetic number, because the mean of its divisors is an integer number (7764306).

Almost surely, 2^28469111 is an apocalyptic number.

28469111 is a deficient number, since it is larger than the sum of its proper divisors (2588113).

28469111 is a wasteful number, since it uses less digits than its factorization.

28469111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2588112.

The product of its digits is 3456, while the sum is 32.

The square root of 28469111 is about 5335.6453217957. The cubic root of 28469111 is about 305.3453438457.

The spelling of 28469111 in words is "twenty-eight million, four hundred sixty-nine thousand, one hundred eleven".