28724027 has 2 divisors, whose sum is σ = 28724028. Its totient is φ = 28724026.

The previous prime is 28724009. The next prime is 28724041. The reversal of 28724027 is 72042782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28724027 - 2¹² = 28719931 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28723984 and 28724002.

It is not a weakly prime, because it can be changed into another prime (28714027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14362013 + 14362014.

It is an arithmetic number, because the mean of its divisors is an integer number (14362014).

Almost surely, 2^28724027 is an apocalyptic number.

28724027 is a deficient number, since it is larger than the sum of its proper divisors (1).

28724027 is an equidigital number, since it uses as much as digits as its factorization.

28724027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 28724027 is about 5359.4801053834. The cubic root of 28724027 is about 306.2540040015.

The spelling of 28724027 in words is "twenty-eight million, seven hundred twenty-four thousand, twenty-seven".