28465472 has 84 divisors (see below), whose sum is σ = 68191380. Its totient is φ = 11741184.

The previous prime is 28465457. The next prime is 28465499. The reversal of 28465472 is 27456482.

It can be written as a sum of positive squares in 2 ways, for example, as 5271616 + 23193856 = 2296^2 + 4816^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90788 + ... + 91100.

Almost surely, 2^28465472 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 28465472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34095690).

28465472 is an abundant number, since it is smaller than the sum of its proper divisors (39725908).

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

28465472 is a wasteful number, since it uses less digits than its factorization.

28465472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 351 counting only the distinct ones).

The product of its digits is 107520, while the sum is 38.

The square root of 28465472 is about 5335.3043024742. The cubic root of 28465472 is about 305.3323332644.

It can be divided in two parts, 284 and 65472, that added together give a palindrome (65756).

The spelling of 28465472 in words is "twenty-eight million, four hundred sixty-five thousand, four hundred seventy-two".