28752216 has 32 divisors (see below), whose sum is σ = 72025200. Its totient is φ = 9564800.

The previous prime is 28752211. The next prime is 28752239. The reversal of 28752216 is 61225782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28752211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15970 + ... + 17678.

Almost surely, 2^28752216 is an apocalyptic number.

It is an amenable number.

28752216 is an abundant number, since it is smaller than the sum of its proper divisors (43272984).

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

28752216 is a wasteful number, since it uses less digits than its factorization.

28752216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2419 (or 2415 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 28752216 is about 5362.1092864655. The cubic root of 28752216 is about 306.3541544388.

Adding to 28752216 its reverse (61225782), we get a palindrome (89977998).

The spelling of 28752216 in words is "twenty-eight million, seven hundred fifty-two thousand, two hundred sixteen".