28016537 has 2 divisors, whose sum is σ = 28016538. Its totient is φ = 28016536.

The previous prime is 28016533. The next prime is 28016539. The reversal of 28016537 is 73561082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24314761 + 3701776 = 4931^2 + 1924^2 .

It is a cyclic number.

It is not a de Polignac number, because 28016537 - 2² = 28016533 is a prime.

Together with 28016539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28016531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14008268 + 14008269.

It is an arithmetic number, because the mean of its divisors is an integer number (14008269).

Almost surely, 2^28016537 is an apocalyptic number.

It is an amenable number.

28016537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28016537 is an equidigital number, since it uses as much as digits as its factorization.

28016537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 28016537 is about 5293.0649910992. The cubic root of 28016537 is about 303.7186664603.

The spelling of 28016537 in words is "twenty-eight million, sixteen thousand, five hundred thirty-seven".