28869215 has 8 divisors (see below), whose sum is σ = 35760768. Its totient is φ = 22350240.

The previous prime is 28869199. The next prime is 28869221. The reversal of 28869215 is 51296882.

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

It is not a de Polignac number, because 28869215 - 2⁴ = 28869199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92972 + ... + 93281.

It is an arithmetic number, because the mean of its divisors is an integer number (4470096).

Almost surely, 2^28869215 is an apocalyptic number.

28869215 is a deficient number, since it is larger than the sum of its proper divisors (6891553).

28869215 is a wasteful number, since it uses less digits than its factorization.

28869215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186289.

The product of its digits is 69120, while the sum is 41.

The square root of 28869215 is about 5373.0080029719. The cubic root of 28869215 is about 306.7691325574.

The spelling of 28869215 in words is "twenty-eight million, eight hundred sixty-nine thousand, two hundred fifteen".