28894944 has 96 divisors (see below), whose sum is σ = 82766880. Its totient is φ = 8825856.

The previous prime is 28894939. The next prime is 28894967. The reversal of 28894944 is 44949882.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 28894893 and 28894902.

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 15 ways as a sum of consecutive naturals, for example, 210844 + ... + 210980.

It is an arithmetic number, because the mean of its divisors is an integer number (862155).

Almost surely, 2^28894944 is an apocalyptic number.

28894944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28894944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41383440).

28894944 is an abundant number, since it is smaller than the sum of its proper divisors (53871936).

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

28894944 is a wasteful number, since it uses less digits than its factorization.

28894944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 155 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The square root of 28894944 is about 5375.4017524274. The cubic root of 28894944 is about 306.8602390573.

The spelling of 28894944 in words is "twenty-eight million, eight hundred ninety-four thousand, nine hundred forty-four".