28351216 has 20 divisors (see below), whose sum is σ = 55074600. Its totient is φ = 14138432.

The previous prime is 28351201. The next prime is 28351247. The reversal of 28351216 is 61215382.

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, 4590 + ... + 8818.

It is an arithmetic number, because the mean of its divisors is an integer number (2753730).

Almost surely, 2^28351216 is an apocalyptic number.

It is an amenable number.

28351216 is a deficient number, since it is larger than the sum of its proper divisors (26723384).

28351216 is a wasteful number, since it uses less digits than its factorization.

28351216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656 (or 4650 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 28351216 is about 5324.5859932956. The cubic root of 28351216 is about 304.9232665517.

Adding to 28351216 its reverse (61215382), we get a palindrome (89566598).

The spelling of 28351216 in words is "twenty-eight million, three hundred fifty-one thousand, two hundred sixteen".