28242529 has 16 divisors (see below), whose sum is σ = 33390720. Its totient is φ = 23385600.

The previous prime is 28242527. The next prime is 28242553. The reversal of 28242529 is 92524282.

It is not a de Polignac number, because 28242529 - 2¹ = 28242527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28242494 and 28242503.

It is not an unprimeable number, because it can be changed into a prime (28242527) 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, 29937 + ... + 30865.

It is an arithmetic number, because the mean of its divisors is an integer number (2086920).

Almost surely, 2^28242529 is an apocalyptic number.

It is an amenable number.

28242529 is a deficient number, since it is larger than the sum of its proper divisors (5148191).

28242529 is a wasteful number, since it uses less digits than its factorization.

28242529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080.

The product of its digits is 23040, while the sum is 34.

The square root of 28242529 is about 5314.3700473339. The cubic root of 28242529 is about 304.5331170846.

The spelling of 28242529 in words is "twenty-eight million, two hundred forty-two thousand, five hundred twenty-nine".