28163019 has 8 divisors (see below), whose sum is σ = 37707472. Its totient is φ = 18696960.

The previous prime is 28162991. The next prime is 28163021. The reversal of 28163019 is 91036182.

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

It is not a de Polignac number, because 28163019 - 2⁵ = 28162987 is a prime.

It is a super-2 number, since 2×28163019² = 1586311278388722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28163099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18754 + ... + 20199.

It is an arithmetic number, because the mean of its divisors is an integer number (4713434).

Almost surely, 2^28163019 is an apocalyptic number.

28163019 is a deficient number, since it is larger than the sum of its proper divisors (9544453).

28163019 is a wasteful number, since it uses less digits than its factorization.

28163019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39197.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 28163019 is about 5306.8841140541. The cubic root of 28163019 is about 304.2470687390.

The spelling of 28163019 in words is "twenty-eight million, one hundred sixty-three thousand, nineteen".