28395215 has 8 divisors (see below), whose sum is σ = 35867760. Its totient is φ = 21520512.

The previous prime is 28395197. The next prime is 28395217. The reversal of 28395215 is 51259382.

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 28395215 - 2¹² = 28391119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28395217) 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, 149354 + ... + 149543.

It is an arithmetic number, because the mean of its divisors is an integer number (4483470).

Almost surely, 2^28395215 is an apocalyptic number.

28395215 is a deficient number, since it is larger than the sum of its proper divisors (7472545).

28395215 is a wasteful number, since it uses less digits than its factorization.

28395215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298921.

The product of its digits is 21600, while the sum is 35.

The square root of 28395215 is about 5328.7160742528. The cubic root of 28395215 is about 305.0809245090.

The spelling of 28395215 in words is "twenty-eight million, three hundred ninety-five thousand, two hundred fifteen".