28103472 has 30 divisors (see below), whose sum is σ = 78651092. Its totient is φ = 9367776.

The previous prime is 28103423. The next prime is 28103483. The reversal of 28103472 is 27430182.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 97438 + ... + 97725.

Almost surely, 2^28103472 is an apocalyptic number.

It is an amenable number.

28103472 is an abundant number, since it is smaller than the sum of its proper divisors (50547620).

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

28103472 is a wasteful number, since it uses less digits than its factorization.

28103472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195177 (or 195168 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28103472 is about 5301.2707910462. The cubic root of 28103472 is about 304.0324872945.

The spelling of 28103472 in words is "twenty-eight million, one hundred three thousand, four hundred seventy-two".