28338137 has 2 divisors, whose sum is σ = 28338138. Its totient is φ = 28338136.

The previous prime is 28338127. The next prime is 28338143. The reversal of 28338137 is 73183382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28047616 + 290521 = 5296^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 28338137 - 2⁶ = 28338073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28338097 and 28338106.

It is not a weakly prime, because it can be changed into another prime (28338127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14169068 + 14169069.

It is an arithmetic number, because the mean of its divisors is an integer number (14169069).

Almost surely, 2^28338137 is an apocalyptic number.

It is an amenable number.

28338137 is a deficient number, since it is larger than the sum of its proper divisors (1).

28338137 is an equidigital number, since it uses as much as digits as its factorization.

28338137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 28338137 is about 5323.3576810130. The cubic root of 28338137 is about 304.8763702114.

The spelling of 28338137 in words is "twenty-eight million, three hundred thirty-eight thousand, one hundred thirty-seven".