28455732 has 48 divisors (see below), whose sum is σ = 74249280. Its totient is φ = 9424224.

The previous prime is 28455719. The next prime is 28455733. The reversal of 28455732 is 23755482.

28455732 is a `hidden beast` number, since 2 + 84 + 5 + 573 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28455733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17923 + ... + 19445.

It is an arithmetic number, because the mean of its divisors is an integer number (1546860).

Almost surely, 2^28455732 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 28455732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37124640).

28455732 is an abundant number, since it is smaller than the sum of its proper divisors (45793548).

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

28455732 is a wasteful number, since it uses less digits than its factorization.

28455732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709 (or 1701 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 28455732 is about 5334.3914367058. The cubic root of 28455732 is about 305.2975042127.

The spelling of 28455732 in words is "twenty-eight million, four hundred fifty-five thousand, seven hundred thirty-two".