28473872 has 80 divisors (see below), whose sum is σ = 66662400. Its totient is φ = 11525760.

The previous prime is 28473833. The next prime is 28473889. The reversal of 28473872 is 27837482.

It is a super-2 number, since 2×28473872² = 1621522773344768, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 204779 + ... + 204917.

It is an arithmetic number, because the mean of its divisors is an integer number (833280).

Almost surely, 2^28473872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28473872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33331200).

28473872 is an abundant number, since it is smaller than the sum of its proper divisors (38188528).

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

28473872 is a wasteful number, since it uses less digits than its factorization.

28473872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 238 counting only the distinct ones).

The product of its digits is 150528, while the sum is 41.

The square root of 28473872 is about 5336.0914534892. The cubic root of 28473872 is about 305.3623642595.

The spelling of 28473872 in words is "twenty-eight million, four hundred seventy-three thousand, eight hundred seventy-two".