28842019 has 4 divisors (see below), whose sum is σ = 30360040. Its totient is φ = 27324000.

The previous prime is 28842001. The next prime is 28842043. The reversal of 28842019 is 91024882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28842019 - 2⁵ = 28841987 is a prime.

It is a super-2 number, since 2×28842019² = 1663724119992722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28842049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758982 + ... + 759019.

It is an arithmetic number, because the mean of its divisors is an integer number (7590010).

Almost surely, 2^28842019 is an apocalyptic number.

28842019 is a deficient number, since it is larger than the sum of its proper divisors (1518021).

28842019 is a wasteful number, since it uses less digits than its factorization.

28842019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518020.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 28842019 is about 5370.4766082723. The cubic root of 28842019 is about 306.6727725365.

The spelling of 28842019 in words is "twenty-eight million, eight hundred forty-two thousand, nineteen".