28940832 has 54 divisors (see below), whose sum is σ = 82560933. Its totient is φ = 9616512.

The previous prime is 28940797. The next prime is 28940881. The reversal of 28940832 is 23804982.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 21123216 + 7817616 = 4596^2 + 2796^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3804.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 91138 + ... + 91454.

Almost surely, 2^28940832 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 28940832

28940832 is an abundant number, since it is smaller than the sum of its proper divisors (53620101).

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

28940832 is an equidigital number, since it uses as much as digits as its factorization.

28940832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28940832 is about 5379.6683912673. The cubic root of 28940832 is about 307.0225945096.

The spelling of 28940832 in words is "twenty-eight million, nine hundred forty thousand, eight hundred thirty-two".