28214216 has 32 divisors (see below), whose sum is σ = 56505600. Its totient is φ = 13177920.

The previous prime is 28214201. The next prime is 28214233. The reversal of 28214216 is 61241282.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5231 + ... + 9153.

It is an arithmetic number, because the mean of its divisors is an integer number (1765800).

Almost surely, 2^28214216 is an apocalyptic number.

It is an amenable number.

28214216 is an abundant number, since it is smaller than the sum of its proper divisors (28291384).

28214216 is a wasteful number, since it uses less digits than its factorization.

28214216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989 (or 3985 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 28214216 is about 5311.7055641291. The cubic root of 28214216 is about 304.4313187293.

Adding to 28214216 its reverse (61241282), we get a palindrome (89455498).

The spelling of 28214216 in words is "twenty-eight million, two hundred fourteen thousand, two hundred sixteen".