28869216 has 24 divisors (see below), whose sum is σ = 75781944. Its totient is φ = 9623040.

The previous prime is 28869199. The next prime is 28869221. The reversal of 28869216 is 61296882.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150265 + ... + 150456.

It is an arithmetic number, because the mean of its divisors is an integer number (3157581).

Almost surely, 2^28869216 is an apocalyptic number.

It is an amenable number.

28869216 is an abundant number, since it is smaller than the sum of its proper divisors (46912728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28869216 is a wasteful number, since it uses less digits than its factorization.

28869216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300734 (or 300726 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 28869216 is about 5373.0080960296. The cubic root of 28869216 is about 306.7691360995.

The spelling of 28869216 in words is "twenty-eight million, eight hundred sixty-nine thousand, two hundred sixteen".