28281419 has 2 divisors, whose sum is σ = 28281420. Its totient is φ = 28281418.

The previous prime is 28281413. The next prime is 28281427. The reversal of 28281419 is 91418282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28281419 - 2⁴ = 28281403 is a prime.

It is a super-2 number, since 2×28281419² = 1599677321307122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28281413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14140709 + 14140710.

It is an arithmetic number, because the mean of its divisors is an integer number (14140710).

Almost surely, 2^28281419 is an apocalyptic number.

28281419 is a deficient number, since it is larger than the sum of its proper divisors (1).

28281419 is an equidigital number, since it uses as much as digits as its factorization.

28281419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 35.

The square root of 28281419 is about 5318.0277359186. The cubic root of 28281419 is about 304.6728338099.

The spelling of 28281419 in words is "twenty-eight million, two hundred eighty-one thousand, four hundred nineteen".