28127019 has 8 divisors (see below), whose sum is σ = 37570000. Its totient is φ = 18717696.

The previous prime is 28126997. The next prime is 28127023. The reversal of 28127019 is 91072182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28127019 - 2⁹ = 28126507 is a prime.

It is a super-2 number, since 2×28127019² = 1582258395652722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28127089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6394 + ... + 9855.

It is an arithmetic number, because the mean of its divisors is an integer number (4696250).

Almost surely, 2^28127019 is an apocalyptic number.

28127019 is a deficient number, since it is larger than the sum of its proper divisors (9442981).

28127019 is a wasteful number, since it uses less digits than its factorization.

28127019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16829.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 28127019 is about 5303.4912086285. The cubic root of 28127019 is about 304.1173766213.

The spelling of 28127019 in words is "twenty-eight million, one hundred twenty-seven thousand, nineteen".