28049823 has 12 divisors (see below), whose sum is σ = 41823808. Its totient is φ = 18096480.

The previous prime is 28049809. The next prime is 28049849. The reversal of 28049823 is 32894082.

It is not a de Polignac number, because 28049823 - 2⁴ = 28049807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28049893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49990 + ... + 50547.

Almost surely, 2^28049823 is an apocalyptic number.

28049823 is a deficient number, since it is larger than the sum of its proper divisors (13773985).

28049823 is a wasteful number, since it uses less digits than its factorization.

28049823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100574 (or 100571 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28049823 is about 5296.2083607049. The cubic root of 28049823 is about 303.8388999554.

The spelling of 28049823 in words is "twenty-eight million, forty-nine thousand, eight hundred twenty-three".