28134215 has 8 divisors (see below), whose sum is σ = 34019568. Its totient is φ = 22335040.

The previous prime is 28134181. The next prime is 28134217. The reversal of 28134215 is 51243182.

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

It is not a de Polignac number, because 28134215 - 2⁶ = 28134151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28134217) 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, 20822 + ... + 22131.

It is an arithmetic number, because the mean of its divisors is an integer number (4252446).

Almost surely, 2^28134215 is an apocalyptic number.

28134215 is a deficient number, since it is larger than the sum of its proper divisors (5885353).

28134215 is a wasteful number, since it uses less digits than its factorization.

28134215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43089.

The product of its digits is 1920, while the sum is 26.

The square root of 28134215 is about 5304.1695862783. The cubic root of 28134215 is about 304.1433094802.

Adding to 28134215 its reverse (51243182), we get a palindrome (79377397).

The spelling of 28134215 in words is "twenty-eight million, one hundred thirty-four thousand, two hundred fifteen".