28728341 has 2 divisors, whose sum is σ = 28728342. Its totient is φ = 28728340.

The previous prime is 28728319. The next prime is 28728353. The reversal of 28728341 is 14382782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22372900 + 6355441 = 4730^2 + 2521^2 .

It is a cyclic number.

It is not a de Polignac number, because 28728341 - 2⁶ = 28728277 is a prime.

It is a super-2 number, since 2×28728341² = 1650635153224562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28728641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14364170 + 14364171.

It is an arithmetic number, because the mean of its divisors is an integer number (14364171).

Almost surely, 2^28728341 is an apocalyptic number.

It is an amenable number.

28728341 is a deficient number, since it is larger than the sum of its proper divisors (1).

28728341 is an equidigital number, since it uses as much as digits as its factorization.

28728341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 35.

The square root of 28728341 is about 5359.8825546835. The cubic root of 28728341 is about 306.2693351113.

The spelling of 28728341 in words is "twenty-eight million, seven hundred twenty-eight thousand, three hundred forty-one".