28820149 has 2 divisors, whose sum is σ = 28820150. Its totient is φ = 28820148.

The previous prime is 28820119. The next prime is 28820167. The reversal of 28820149 is 94102882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24059025 + 4761124 = 4905^2 + 2182^2 .

It is a cyclic number.

It is not a de Polignac number, because 28820149 - 2¹⁷ = 28689077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28820119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14410074 + 14410075.

It is an arithmetic number, because the mean of its divisors is an integer number (14410075).

Almost surely, 2^28820149 is an apocalyptic number.

It is an amenable number.

28820149 is a deficient number, since it is larger than the sum of its proper divisors (1).

28820149 is an equidigital number, since it uses as much as digits as its factorization.

28820149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 28820149 is about 5368.4400900075. The cubic root of 28820149 is about 306.5952394823.

The spelling of 28820149 in words is "twenty-eight million, eight hundred twenty thousand, one hundred forty-nine".