28112512 has 16 divisors (see below), whose sum is σ = 56005650. Its totient is φ = 14056192.

The previous prime is 28112507. The next prime is 28112551. The reversal of 28112512 is 21521182.

It can be written as a sum of positive squares in only one way, i.e., 25969216 + 2143296 = 5096^2 + 1464^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109687 + ... + 109942.

Almost surely, 2^28112512 is an apocalyptic number.

It is an amenable number.

28112512 is a deficient number, since it is larger than the sum of its proper divisors (27893138).

28112512 is an equidigital number, since it uses as much as digits as its factorization.

28112512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219643 (or 219631 counting only the distinct ones).

The product of its digits is 320, while the sum is 22.

The square root of 28112512 is about 5302.1233482446. The cubic root of 28112512 is about 304.0650830184.

Adding to 28112512 its reverse (21521182), we get a palindrome (49633694).

The spelling of 28112512 in words is "twenty-eight million, one hundred twelve thousand, five hundred twelve".