28245529 has 4 divisors (see below), whose sum is σ = 30418276. Its totient is φ = 26072784.

The previous prime is 28245521. The next prime is 28245563. The reversal of 28245529 is 92554282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6901129 + 21344400 = 2627^2 + 4620^2 .

It is a cyclic number.

It is not a de Polignac number, because 28245529 - 2³ = 28245521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28245521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1086354 + ... + 1086379.

It is an arithmetic number, because the mean of its divisors is an integer number (7604569).

Almost surely, 2^28245529 is an apocalyptic number.

It is an amenable number.

28245529 is a deficient number, since it is larger than the sum of its proper divisors (2172747).

28245529 is a wasteful number, since it uses less digits than its factorization.

28245529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172746.

The product of its digits is 57600, while the sum is 37.

The square root of 28245529 is about 5314.6522934243. The cubic root of 28245529 is about 304.5438994878.

The spelling of 28245529 in words is "twenty-eight million, two hundred forty-five thousand, five hundred twenty-nine".