28272512 has 16 divisors (see below), whose sum is σ = 56324400. Its totient is φ = 14136192.

The previous prime is 28272509. The next prime is 28272533. The reversal of 28272512 is 21527282.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110312 + ... + 110567.

It is an arithmetic number, because the mean of its divisors is an integer number (3520275).

Almost surely, 2^28272512 is an apocalyptic number.

It is an amenable number.

28272512 is a deficient number, since it is larger than the sum of its proper divisors (28051888).

28272512 is an equidigital number, since it uses as much as digits as its factorization.

28272512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220893 (or 220881 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 28272512 is about 5317.1902354533. The cubic root of 28272512 is about 304.6408457183.

Adding to 28272512 its reverse (21527282), we get a palindrome (49799794).

The spelling of 28272512 in words is "twenty-eight million, two hundred seventy-two thousand, five hundred twelve".