28922497 has 2 divisors, whose sum is σ = 28922498. Its totient is φ = 28922496.

The previous prime is 28922459. The next prime is 28922501. The reversal of 28922497 is 79422982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26460736 + 2461761 = 5144^2 + 1569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28922497 is a prime.

It is not a weakly prime, because it can be changed into another prime (28922407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14461248 + 14461249.

It is an arithmetic number, because the mean of its divisors is an integer number (14461249).

Almost surely, 2^28922497 is an apocalyptic number.

It is an amenable number.

28922497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28922497 is an equidigital number, since it uses as much as digits as its factorization.

28922497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 28922497 is about 5377.9640199615. The cubic root of 28922497 is about 306.9577443990.

The spelling of 28922497 in words is "twenty-eight million, nine hundred twenty-two thousand, four hundred ninety-seven".