28273901 has 2 divisors, whose sum is σ = 28273902. Its totient is φ = 28273900.

The previous prime is 28273871. The next prime is 28273913. The reversal of 28273901 is 10937282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27510025 + 763876 = 5245^2 + 874^2 .

It is a cyclic number.

It is not a de Polignac number, because 28273901 - 2¹⁰ = 28272877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28273951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14136950 + 14136951.

It is an arithmetic number, because the mean of its divisors is an integer number (14136951).

Almost surely, 2^28273901 is an apocalyptic number.

It is an amenable number.

28273901 is a deficient number, since it is larger than the sum of its proper divisors (1).

28273901 is an equidigital number, since it uses as much as digits as its factorization.

28273901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 28273901 is about 5317.3208479459. The cubic root of 28273901 is about 304.6458345358.

The spelling of 28273901 in words is "twenty-eight million, two hundred seventy-three thousand, nine hundred one".