28263149 has 2 divisors, whose sum is σ = 28263150. Its totient is φ = 28263148.

The previous prime is 28263091. The next prime is 28263161. The reversal of 28263149 is 94136282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28249225 + 13924 = 5315^2 + 118^2 .

It is a cyclic number.

It is not a de Polignac number, because 28263149 - 2¹⁶ = 28197613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28263049) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14131574 + 14131575.

It is an arithmetic number, because the mean of its divisors is an integer number (14131575).

Almost surely, 2^28263149 is an apocalyptic number.

It is an amenable number.

28263149 is a deficient number, since it is larger than the sum of its proper divisors (1).

28263149 is an equidigital number, since it uses as much as digits as its factorization.

28263149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 28263149 is about 5316.3097163352. The cubic root of 28263149 is about 304.6072127303.

The spelling of 28263149 in words is "twenty-eight million, two hundred sixty-three thousand, one hundred forty-nine".