28408472 has 16 divisors (see below), whose sum is σ = 53794800. Its totient is φ = 14063200.

The previous prime is 28408453. The next prime is 28408481. The reversal of 28408472 is 27480482.

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 3 ways as a sum of consecutive naturals, for example, 16772 + ... + 18387.

It is an arithmetic number, because the mean of its divisors is an integer number (3362175).

Almost surely, 2^28408472 is an apocalyptic number.

It is an amenable number.

28408472 is a deficient number, since it is larger than the sum of its proper divisors (25386328).

28408472 is a wasteful number, since it uses less digits than its factorization.

28408472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35266 (or 35262 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 28408472 is about 5329.9598497550. The cubic root of 28408472 is about 305.1283952837.

The spelling of 28408472 in words is "twenty-eight million, four hundred eight thousand, four hundred seventy-two".