28865472 has 56 divisors (see below), whose sum is σ = 76962000. Its totient is φ = 9547776.

The previous prime is 28865467. The next prime is 28865479. The reversal of 28865472 is 27456882.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28865479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28104 + ... + 29112.

Almost surely, 2^28865472 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 28865472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38481000).

28865472 is an abundant number, since it is smaller than the sum of its proper divisors (48096528).

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

28865472 is a wasteful number, since it uses less digits than its factorization.

28865472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1163 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 28865472 is about 5372.6596765475. The cubic root of 28865472 is about 306.7558740686.

The spelling of 28865472 in words is "twenty-eight million, eight hundred sixty-five thousand, four hundred seventy-two".