28436823 has 6 divisors (see below), whose sum is σ = 41075424. Its totient is φ = 18957876.

The previous prime is 28436819. The next prime is 28436861. The reversal of 28436823 is 32863482.

It is not a de Polignac number, because 28436823 - 2² = 28436819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28436873) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1579815 + ... + 1579832.

It is an arithmetic number, because the mean of its divisors is an integer number (6845904).

Almost surely, 2^28436823 is an apocalyptic number.

28436823 is a deficient number, since it is larger than the sum of its proper divisors (12638601).

28436823 is a wasteful number, since it uses less digits than its factorization.

28436823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159653 (or 3159650 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 28436823 is about 5332.6187750485. The cubic root of 28436823 is about 305.2298652372.

The spelling of 28436823 in words is "twenty-eight million, four hundred thirty-six thousand, eight hundred twenty-three".