30728227 has 2 divisors, whose sum is σ = 30728228. Its totient is φ = 30728226.

The previous prime is 30728219. The next prime is 30728233. The reversal of 30728227 is 72282703.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30728227 - 2³ = 30728219 is a prime.

It is not a weakly prime, because it can be changed into another prime (30728237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15364113 + 15364114.

It is an arithmetic number, because the mean of its divisors is an integer number (15364114).

Almost surely, 2^30728227 is an apocalyptic number.

30728227 is a deficient number, since it is larger than the sum of its proper divisors (1).

30728227 is an equidigital number, since it uses as much as digits as its factorization.

30728227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 30728227 is about 5543.3047002668. The cubic root of 30728227 is about 313.2173667982.

The spelling of 30728227 in words is "thirty million, seven hundred twenty-eight thousand, two hundred twenty-seven".