28080215 has 8 divisors (see below), whose sum is σ = 33899040. Its totient is φ = 22328992.

The previous prime is 28080211. The next prime is 28080229. The reversal of 28080215 is 51208082.

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

It is a cyclic number.

It is not a de Polignac number, because 28080215 - 2² = 28080211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28080211) 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, 15980 + ... + 17649.

It is an arithmetic number, because the mean of its divisors is an integer number (4237380).

Almost surely, 2^28080215 is an apocalyptic number.

28080215 is a deficient number, since it is larger than the sum of its proper divisors (5818825).

28080215 is a wasteful number, since it uses less digits than its factorization.

28080215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33801.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 28080215 is about 5299.0768063881. The cubic root of 28080215 is about 303.9485968893.

Adding to 28080215 its reverse (51208082), we get a palindrome (79288297).

The spelling of 28080215 in words is "twenty-eight million, eighty thousand, two hundred fifteen".