28408272 has 40 divisors (see below), whose sum is σ = 73658976. Its totient is φ = 9434496.

The previous prime is 28408253. The next prime is 28408273. The reversal of 28408272 is 27280482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28408273) by changing a digit.

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, 14283 + ... + 16149.

Almost surely, 2^28408272 is an apocalyptic number.

It is an amenable number.

28408272 is an abundant number, since it is smaller than the sum of its proper divisors (45250704).

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

28408272 is a wasteful number, since it uses less digits than its factorization.

28408272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195 (or 2189 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 28408272 is about 5329.9410878545. The cubic root of 28408272 is about 305.1276792318.

It can be divided in two parts, 28408 and 272, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 28408272 in words is "twenty-eight million, four hundred eight thousand, two hundred seventy-two".