28773272 has 32 divisors (see below), whose sum is σ = 60451920. Its totient is φ = 12723840.

The previous prime is 28773257. The next prime is 28773281. The reversal of 28773272 is 27237782.

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 in 7 ways as a sum of consecutive naturals, for example, 1163 + ... + 7674.

Almost surely, 2^28773272 is an apocalyptic number.

28773272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28773272 is an abundant number, since it is smaller than the sum of its proper divisors (31678648).

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

28773272 is a wasteful number, since it uses less digits than its factorization.

28773272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8891 (or 8887 counting only the distinct ones).

The product of its digits is 65856, while the sum is 38.

The square root of 28773272 is about 5364.0723335913. The cubic root of 28773272 is about 306.4289199116.

The spelling of 28773272 in words is "twenty-eight million, seven hundred seventy-three thousand, two hundred seventy-two".