28508419 has 2 divisors, whose sum is σ = 28508420. Its totient is φ = 28508418.

The previous prime is 28508413. The next prime is 28508423. The reversal of 28508419 is 91480582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28508419 - 2⁹ = 28507907 is a prime.

It is a super-2 number, since 2×28508419² = 1625459907759122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28508413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14254209 + 14254210.

It is an arithmetic number, because the mean of its divisors is an integer number (14254210).

Almost surely, 2^28508419 is an apocalyptic number.

28508419 is a deficient number, since it is larger than the sum of its proper divisors (1).

28508419 is an equidigital number, since it uses as much as digits as its factorization.

28508419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28508419 is about 5339.3275793868. The cubic root of 28508419 is about 305.4858118188.

The spelling of 28508419 in words is "twenty-eight million, five hundred eight thousand, four hundred nineteen".