28532237 has 2 divisors, whose sum is σ = 28532238. Its totient is φ = 28532236.

The previous prime is 28532233. The next prime is 28532261. The reversal of 28532237 is 73223582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19616041 + 8916196 = 4429^2 + 2986^2 .

It is a cyclic number.

It is not a de Polignac number, because 28532237 - 2² = 28532233 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28532233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14266118 + 14266119.

It is an arithmetic number, because the mean of its divisors is an integer number (14266119).

Almost surely, 2^28532237 is an apocalyptic number.

It is an amenable number.

28532237 is a deficient number, since it is larger than the sum of its proper divisors (1).

28532237 is an equidigital number, since it uses as much as digits as its factorization.

28532237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 32.

The square root of 28532237 is about 5341.5575443872. The cubic root of 28532237 is about 305.5708631352.

The spelling of 28532237 in words is "twenty-eight million, five hundred thirty-two thousand, two hundred thirty-seven".