28597237 has 2 divisors, whose sum is σ = 28597238. Its totient is φ = 28597236.

The previous prime is 28597207. The next prime is 28597253. The reversal of 28597237 is 73279582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25010001 + 3587236 = 5001^2 + 1894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28597237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28597193 and 28597202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28597207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14298618 + 14298619.

It is an arithmetic number, because the mean of its divisors is an integer number (14298619).

Almost surely, 2^28597237 is an apocalyptic number.

It is an amenable number.

28597237 is a deficient number, since it is larger than the sum of its proper divisors (1).

28597237 is an equidigital number, since it uses as much as digits as its factorization.

28597237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 28597237 is about 5347.6384507556. The cubic root of 28597237 is about 305.8027300159.

The spelling of 28597237 in words is "twenty-eight million, five hundred ninety-seven thousand, two hundred thirty-seven".