28055019 has 16 divisors (see below), whose sum is σ = 38047520. Its totient is φ = 18385920.

The previous prime is 28055017. The next prime is 28055021. The reversal of 28055019 is 91055082.

It is an interprime number because it is at equal distance from previous prime (28055017) and next prime (28055021).

It is not a de Polignac number, because 28055019 - 2¹ = 28055017 is a prime.

It is a super-2 number, since 2×28055019² = 1574168182180722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28055017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66429 + ... + 66849.

It is an arithmetic number, because the mean of its divisors is an integer number (2377970).

Almost surely, 2^28055019 is an apocalyptic number.

28055019 is a deficient number, since it is larger than the sum of its proper divisors (9992501).

28055019 is a wasteful number, since it uses less digits than its factorization.

28055019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 28055019 is about 5296.6988776029. The cubic root of 28055019 is about 303.8576600197.

The spelling of 28055019 in words is "twenty-eight million, fifty-five thousand, nineteen".