28597207 has 2 divisors, whose sum is σ = 28597208. Its totient is φ = 28597206.

The previous prime is 28597199. The next prime is 28597237. The reversal of 28597207 is 70279582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28597207 - 2³ = 28597199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28597207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28597237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14298603 + 14298604.

It is an arithmetic number, because the mean of its divisors is an integer number (14298604).

Almost surely, 2^28597207 is an apocalyptic number.

28597207 is a deficient number, since it is larger than the sum of its proper divisors (1).

28597207 is an equidigital number, since it uses as much as digits as its factorization.

28597207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 28597207 is about 5347.6356457784. The cubic root of 28597207 is about 305.8026230815.

The spelling of 28597207 in words is "twenty-eight million, five hundred ninety-seven thousand, two hundred seven".