28272337 has 2 divisors, whose sum is σ = 28272338. Its totient is φ = 28272336.

The previous prime is 28272319. The next prime is 28272347. The reversal of 28272337 is 73327282.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27867841 + 404496 = 5279^2 + 636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28272337 is a prime.

It is not a weakly prime, because it can be changed into another prime (28272347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14136168 + 14136169.

It is an arithmetic number, because the mean of its divisors is an integer number (14136169).

Almost surely, 2^28272337 is an apocalyptic number.

It is an amenable number.

28272337 is a deficient number, since it is larger than the sum of its proper divisors (1).

28272337 is an equidigital number, since it uses as much as digits as its factorization.

28272337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 34.

The square root of 28272337 is about 5317.1737793681. The cubic root of 28272337 is about 304.6402171660.

The spelling of 28272337 in words is "twenty-eight million, two hundred seventy-two thousand, three hundred thirty-seven".