28502137 has 2 divisors, whose sum is σ = 28502138. Its totient is φ = 28502136.

The previous prime is 28502119. The next prime is 28502143. The reversal of 28502137 is 73120582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28472896 + 29241 = 5336^2 + 171^2 .

It is a cyclic number.

It is not a de Polignac number, because 28502137 - 2⁷ = 28502009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28502197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14251068 + 14251069.

It is an arithmetic number, because the mean of its divisors is an integer number (14251069).

Almost surely, 2^28502137 is an apocalyptic number.

It is an amenable number.

28502137 is a deficient number, since it is larger than the sum of its proper divisors (1).

28502137 is an equidigital number, since it uses as much as digits as its factorization.

28502137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28502137 is about 5338.7392706518. The cubic root of 28502137 is about 305.4633716308.

The spelling of 28502137 in words is "twenty-eight million, five hundred two thousand, one hundred thirty-seven".