28415227 has 2 divisors, whose sum is σ = 28415228. Its totient is φ = 28415226.

The previous prime is 28415207. The next prime is 28415237. The reversal of 28415227 is 72251482.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28415227 - 2²³ = 20026619 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28415207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14207613 + 14207614.

It is an arithmetic number, because the mean of its divisors is an integer number (14207614).

Almost surely, 2^28415227 is an apocalyptic number.

28415227 is a deficient number, since it is larger than the sum of its proper divisors (1).

28415227 is an equidigital number, since it uses as much as digits as its factorization.

28415227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 31.

The square root of 28415227 is about 5330.5934941618. The cubic root of 28415227 is about 305.1525779637.

The spelling of 28415227 in words is "twenty-eight million, four hundred fifteen thousand, two hundred twenty-seven".