28545137 has 2 divisors, whose sum is σ = 28545138. Its totient is φ = 28545136.

The previous prime is 28545131. The next prime is 28545151. The reversal of 28545137 is 73154582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22572001 + 5973136 = 4751^2 + 2444^2 .

It is a cyclic number.

It is not a de Polignac number, because 28545137 - 2⁶ = 28545073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28545097 and 28545106.

It is not a weakly prime, because it can be changed into another prime (28545131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14272568 + 14272569.

It is an arithmetic number, because the mean of its divisors is an integer number (14272569).

Almost surely, 2^28545137 is an apocalyptic number.

It is an amenable number.

28545137 is a deficient number, since it is larger than the sum of its proper divisors (1).

28545137 is an equidigital number, since it uses as much as digits as its factorization.

28545137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 35.

The square root of 28545137 is about 5342.7649209000. The cubic root of 28545137 is about 305.6169077807.

It can be divided in two parts, 28545 and 137, that added together give a palindrome (28682).

The spelling of 28545137 in words is "twenty-eight million, five hundred forty-five thousand, one hundred thirty-seven".