28748261 has 2 divisors, whose sum is σ = 28748262. Its totient is φ = 28748260.

The previous prime is 28748249. The next prime is 28748327. The reversal of 28748261 is 16284782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23136100 + 5612161 = 4810^2 + 2369^2 .

It is a cyclic number.

It is not a de Polignac number, because 28748261 - 2¹⁴ = 28731877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28748221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14374130 + 14374131.

It is an arithmetic number, because the mean of its divisors is an integer number (14374131).

Almost surely, 2^28748261 is an apocalyptic number.

It is an amenable number.

28748261 is a deficient number, since it is larger than the sum of its proper divisors (1).

28748261 is an equidigital number, since it uses as much as digits as its factorization.

28748261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 38.

The square root of 28748261 is about 5361.7404823434. The cubic root of 28748261 is about 306.3401069854.

The spelling of 28748261 in words is "twenty-eight million, seven hundred forty-eight thousand, two hundred sixty-one".