28635137 has 2 divisors, whose sum is σ = 28635138. Its totient is φ = 28635136.

The previous prime is 28635091. The next prime is 28635283. The reversal of 28635137 is 73153682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28633201 + 1936 = 5351^2 + 44^2 .

It is a cyclic number.

It is not a de Polignac number, because 28635137 - 2¹⁴ = 28618753 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28635097 and 28635106.

It is not a weakly prime, because it can be changed into another prime (28635037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14317568 + 14317569.

It is an arithmetic number, because the mean of its divisors is an integer number (14317569).

Almost surely, 2^28635137 is an apocalyptic number.

It is an amenable number.

28635137 is a deficient number, since it is larger than the sum of its proper divisors (1).

28635137 is an equidigital number, since it uses as much as digits as its factorization.

28635137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 28635137 is about 5351.1808977085. The cubic root of 28635137 is about 305.9377641240.

It can be divided in two parts, 2863 and 5137, that added together give a cube (8000 = 20³).

The spelling of 28635137 in words is "twenty-eight million, six hundred thirty-five thousand, one hundred thirty-seven".