28928272 has 10 divisors (see below), whose sum is σ = 56048558. Its totient is φ = 14464128.

The previous prime is 28928269. The next prime is 28928309. The reversal of 28928272 is 27282982.

It can be written as a sum of positive squares in only one way, i.e., 28901376 + 26896 = 5376^2 + 164^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 903993 + ... + 904024.

Almost surely, 2^28928272 is an apocalyptic number.

It is an amenable number.

28928272 is a deficient number, since it is larger than the sum of its proper divisors (27120286).

28928272 is a wasteful number, since it uses less digits than its factorization.

28928272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808025 (or 1808019 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 28928272 is about 5378.5009063865. The cubic root of 28928272 is about 306.9781732830.

It can be divided in two parts, 289 and 28272, that added together give a 4-th power (28561 = 13⁴).

The spelling of 28928272 in words is "twenty-eight million, nine hundred twenty-eight thousand, two hundred seventy-two".