28385272 has 8 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 14192632.

The previous prime is 28385267. The next prime is 28385311. The reversal of 28385272 is 27258382.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1774072 + ... + 1774087.

It is an arithmetic number, because the mean of its divisors is an integer number (6652800).

Almost surely, 2^28385272 is an apocalyptic number.

It is an amenable number.

28385272 is a deficient number, since it is larger than the sum of its proper divisors (24837128).

28385272 is a wasteful number, since it uses less digits than its factorization.

28385272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3548165 (or 3548161 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 28385272 is about 5327.7830286152. The cubic root of 28385272 is about 305.0453108352.

The spelling of 28385272 in words is "twenty-eight million, three hundred eighty-five thousand, two hundred seventy-two".