28265472 has 66 divisors (see below), whose sum is σ = 81642548. Its totient is φ = 9418752.

The previous prime is 28265467. The next prime is 28265507. The reversal of 28265472 is 27456282.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 7683 + ... + 10749.

Almost surely, 2^28265472 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 28265472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40821274).

28265472 is an abundant number, since it is smaller than the sum of its proper divisors (53377076).

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

28265472 is a wasteful number, since it uses less digits than its factorization.

28265472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093 (or 3072 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 28265472 is about 5316.5281904641. The cubic root of 28265472 is about 304.6155579100.

The spelling of 28265472 in words is "twenty-eight million, two hundred sixty-five thousand, four hundred seventy-two".