28790297 has 2 divisors, whose sum is σ = 28790298. Its totient is φ = 28790296.

The previous prime is 28790291. The next prime is 28790303. The reversal of 28790297 is 79209782.

It is a balanced prime because it is at equal distance from previous prime (28790291) and next prime (28790303).

It can be written as a sum of positive squares in only one way, i.e., 21799561 + 6990736 = 4669^2 + 2644^2 .

It is a cyclic number.

It is not a de Polignac number, because 28790297 - 2¹⁰ = 28789273 is a prime.

It is not a weakly prime, because it can be changed into another prime (28790291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14395148 + 14395149.

It is an arithmetic number, because the mean of its divisors is an integer number (14395149).

Almost surely, 2^28790297 is an apocalyptic number.

It is an amenable number.

28790297 is a deficient number, since it is larger than the sum of its proper divisors (1).

28790297 is an equidigital number, since it uses as much as digits as its factorization.

28790297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 28790297 is about 5365.6590461937. The cubic root of 28790297 is about 306.4893454777.

The spelling of 28790297 in words is "twenty-eight million, seven hundred ninety thousand, two hundred ninety-seven".