28988272 has 10 divisors (see below), whose sum is σ = 56164808. Its totient is φ = 14494128.

The previous prime is 28988269. The next prime is 28988291. The reversal of 28988272 is 27288982.

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, 905868 + ... + 905899.

Almost surely, 2^28988272 is an apocalyptic number.

It is an amenable number.

28988272 is a deficient number, since it is larger than the sum of its proper divisors (27176536).

28988272 is a wasteful number, since it uses less digits than its factorization.

28988272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811775 (or 1811769 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 28988272 is about 5384.0757795559. The cubic root of 28988272 is about 307.1902607409.

The spelling of 28988272 in words is "twenty-eight million, nine hundred eighty-eight thousand, two hundred seventy-two".