28152219 has 8 divisors (see below), whose sum is σ = 37767232. Its totient is φ = 18652680.

The previous prime is 28152211. The next prime is 28152233. The reversal of 28152219 is 91225182.

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

It is not a de Polignac number, because 28152219 - 2³ = 28152211 is a prime.

It is a super-2 number, since 2×28152219² = 1585094869247922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28152211) 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, 28297 + ... + 29274.

It is an arithmetic number, because the mean of its divisors is an integer number (4720904).

Almost surely, 2^28152219 is an apocalyptic number.

28152219 is a deficient number, since it is larger than the sum of its proper divisors (9615013).

28152219 is a wasteful number, since it uses less digits than its factorization.

28152219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57737.

The product of its digits is 2880, while the sum is 30.

The square root of 28152219 is about 5305.8664702384. The cubic root of 28152219 is about 304.2081727142.

The spelling of 28152219 in words is "twenty-eight million, one hundred fifty-two thousand, two hundred nineteen".