28447472 has 20 divisors (see below), whose sum is σ = 56022456. Its totient is φ = 13990080.

The previous prime is 28447451. The next prime is 28447483. The reversal of 28447472 is 27474482.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 13598 + ... + 15549.

Almost surely, 2^28447472 is an apocalyptic number.

It is an amenable number.

28447472 is a deficient number, since it is larger than the sum of its proper divisors (27574984).

28447472 is a wasteful number, since it uses less digits than its factorization.

28447472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29216 (or 29210 counting only the distinct ones).

The product of its digits is 100352, while the sum is 38.

The square root of 28447472 is about 5333.6171591144. The cubic root of 28447472 is about 305.2679612320.

The spelling of 28447472 in words is "twenty-eight million, four hundred forty-seven thousand, four hundred seventy-two".