28434813 has 16 divisors (see below), whose sum is σ = 41664000. Its totient is φ = 17106480.

The previous prime is 28434797. The next prime is 28434817. The reversal of 28434813 is 31843482.

It is not a de Polignac number, because 28434813 - 2⁴ = 28434797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 1488 + ... + 7686.

It is an arithmetic number, because the mean of its divisors is an integer number (2604000).

Almost surely, 2^28434813 is an apocalyptic number.

It is an amenable number.

28434813 is a deficient number, since it is larger than the sum of its proper divisors (13229187).

28434813 is a wasteful number, since it uses less digits than its factorization.

28434813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352.

The product of its digits is 18432, while the sum is 33.

The square root of 28434813 is about 5332.4303089679. The cubic root of 28434813 is about 305.2226735467. Note that the first 3 decimals are identical.

The spelling of 28434813 in words is "twenty-eight million, four hundred thirty-four thousand, eight hundred thirteen".