28621184 has 32 divisors (see below), whose sum is σ = 58866240. Its totient is φ = 13847040.

The previous prime is 28621171. The next prime is 28621193. The reversal of 28621184 is 48112682.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

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

It is a self number, because there is not a number n which added to its sum of digits gives 28621184.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 362 + ... + 7574.

It is an arithmetic number, because the mean of its divisors is an integer number (1839570).

Almost surely, 2^28621184 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 28621184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29433120).

28621184 is an abundant number, since it is smaller than the sum of its proper divisors (30245056).

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

28621184 is an equidigital number, since it uses as much as digits as its factorization.

28621184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7258 (or 7246 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 28621184 is about 5349.8770079321. The cubic root of 28621184 is about 305.8880647733. Note that the first 3 decimals are identical.

The spelling of 28621184 in words is "twenty-eight million, six hundred twenty-one thousand, one hundred eighty-four".