28527229 has 6 divisors (see below), whose sum is σ = 28757274. Its totient is φ = 28298160.

The previous prime is 28527221. The next prime is 28527251. The reversal of 28527229 is 92272582.

28527229 = T₂₀₂ + T₂₀₃ + ... + T₅₆₃.

It can be written as a sum of positive squares in 3 ways, for example, as 1435204 + 27092025 = 1198^2 + 5205^2 .

It is not a de Polignac number, because 28527229 - 2³ = 28527221 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 (28527221) 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, 71659 + ... + 72055.

It is an arithmetic number, because the mean of its divisors is an integer number (4792879).

Almost surely, 2^28527229 is an apocalyptic number.

It is an amenable number.

28527229 is a deficient number, since it is larger than the sum of its proper divisors (230045).

28527229 is an frugal number, since it uses more digits than its factorization.

28527229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975 (or 578 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 28527229 is about 5341.0887466883. The cubic root of 28527229 is about 305.5529840788.

The spelling of 28527229 in words is "twenty-eight million, five hundred twenty-seven thousand, two hundred twenty-nine".