28527213 has 32 divisors (see below), whose sum is σ = 46247040. Its totient is φ = 15402240.

The previous prime is 28527209. The next prime is 28527221. The reversal of 28527213 is 31272582.

It is not a de Polignac number, because 28527213 - 2² = 28527209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28527253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11295 + ... + 13587.

It is an arithmetic number, because the mean of its divisors is an integer number (1445220).

Almost surely, 2^28527213 is an apocalyptic number.

It is an amenable number.

28527213 is a deficient number, since it is larger than the sum of its proper divisors (17719827).

28527213 is a wasteful number, since it uses less digits than its factorization.

28527213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349.

The product of its digits is 6720, while the sum is 30.

The square root of 28527213 is about 5341.0872488661. The cubic root of 28527213 is about 305.5529269538.

Adding to 28527213 its reverse (31272582), we get a palindrome (59799795).

The spelling of 28527213 in words is "twenty-eight million, five hundred twenty-seven thousand, two hundred thirteen".