28502197 has 2 divisors, whose sum is σ = 28502198. Its totient is φ = 28502196.

The previous prime is 28502179. The next prime is 28502231. The reversal of 28502197 is 79120582.

Together with previous prime (28502179) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (28502231) can be obtained adding 28502197 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15928081 + 12574116 = 3991^2 + 3546^2 .

It is a cyclic number.

It is not a de Polignac number, because 28502197 - 2²³ = 20113589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28502137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14251098 + 14251099.

It is an arithmetic number, because the mean of its divisors is an integer number (14251099).

Almost surely, 2^28502197 is an apocalyptic number.

It is an amenable number.

28502197 is a deficient number, since it is larger than the sum of its proper divisors (1).

28502197 is an equidigital number, since it uses as much as digits as its factorization.

28502197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 28502197 is about 5338.7448899531. The cubic root of 28502197 is about 305.4635859748.

The spelling of 28502197 in words is "twenty-eight million, five hundred two thousand, one hundred ninety-seven".