28549533 has 16 divisors (see below), whose sum is σ = 41155520. Its totient is φ = 17542656.

The previous prime is 28549531. The next prime is 28549537. The reversal of 28549533 is 33594582.

It is not a de Polignac number, because 28549533 - 2¹ = 28549531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28549491 and 28549500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28549531) 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, 4660 + ... + 8877.

It is an arithmetic number, because the mean of its divisors is an integer number (2572220).

Almost surely, 2^28549533 is an apocalyptic number.

It is an amenable number.

28549533 is a deficient number, since it is larger than the sum of its proper divisors (12605987).

28549533 is a wasteful number, since it uses less digits than its factorization.

28549533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13596.

The product of its digits is 129600, while the sum is 39.

The square root of 28549533 is about 5343.1763025377. The cubic root of 28549533 is about 305.6325954846.

The spelling of 28549533 in words is "twenty-eight million, five hundred forty-nine thousand, five hundred thirty-three".