28040576 has 64 divisors (see below), whose sum is σ = 58752000. Its totient is φ = 13318656.

The previous prime is 28040569. The next prime is 28040581. The reversal of 28040576 is 67504082.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354905 + ... + 354983.

It is an arithmetic number, because the mean of its divisors is an integer number (918000).

Almost surely, 2^28040576 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 28040576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29376000).

28040576 is an abundant number, since it is smaller than the sum of its proper divisors (30711424).

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

28040576 is an equidigital number, since it uses as much as digits as its factorization.

28040576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 28040576 is about 5295.3353057196. The cubic root of 28040576 is about 303.8055080976.

The spelling of 28040576 in words is "twenty-eight million, forty thousand, five hundred seventy-six".