28434811 has 4 divisors (see below), whose sum is σ = 29931400. Its totient is φ = 26938224.

The previous prime is 28434797. The next prime is 28434817. The reversal of 28434811 is 11843482.

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 28434811 - 2⁷ = 28434683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28434817) 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, 748266 + ... + 748303.

It is an arithmetic number, because the mean of its divisors is an integer number (7482850).

Almost surely, 2^28434811 is an apocalyptic number.

28434811 is a deficient number, since it is larger than the sum of its proper divisors (1496589).

28434811 is a wasteful number, since it uses less digits than its factorization.

28434811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496588.

The product of its digits is 6144, while the sum is 31.

The square root of 28434811 is about 5332.4301214362. The cubic root of 28434811 is about 305.2226663906. Note that the first 3 decimals are identical.

It can be divided in two parts, 2843481 and 1, that added together give a palindrome (2843482).

The spelling of 28434811 in words is "twenty-eight million, four hundred thirty-four thousand, eight hundred eleven".