28936216 has 8 divisors (see below), whose sum is σ = 54255420. Its totient is φ = 14468104.

The previous prime is 28936213. The next prime is 28936217. The reversal of 28936216 is 61263982.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28936213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1808506 + ... + 1808521.

Almost surely, 2^28936216 is an apocalyptic number.

It is an amenable number.

28936216 is a deficient number, since it is larger than the sum of its proper divisors (25319204).

28936216 is a wasteful number, since it uses less digits than its factorization.

28936216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617033 (or 3617029 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 28936216 is about 5379.2393514325. The cubic root of 28936216 is about 307.0062704955.

The spelling of 28936216 in words is "twenty-eight million, nine hundred thirty-six thousand, two hundred sixteen".