28269472 has 108 divisors (see below), whose sum is σ = 71640450. Its totient is φ = 10940160.

The previous prime is 28269401. The next prime is 28269491. The reversal of 28269472 is 27496282.

It can be written as a sum of positive squares in only one way, i.e., 27415696 + 853776 = 5236^2 + 924^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 189654 + ... + 189802.

Almost surely, 2^28269472 is an apocalyptic number.

28269472 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28269472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35820225).

28269472 is an abundant number, since it is smaller than the sum of its proper divisors (43370978).

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

28269472 is a wasteful number, since it uses less digits than its factorization.

28269472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 169 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 28269472 is about 5316.9043625027. The cubic root of 28269472 is about 304.6299264979.

The spelling of 28269472 in words is "twenty-eight million, two hundred sixty-nine thousand, four hundred seventy-two".