28949844 has 192 divisors, whose sum is σ = 94832640. Its totient is φ = 6635520.

The previous prime is 28949779. The next prime is 28949857. The reversal of 28949844 is 44894982.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28949793 and 28949802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 298404 + ... + 298500.

It is an arithmetic number, because the mean of its divisors is an integer number (493920).

Almost surely, 2^28949844 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 28949844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47416320).

28949844 is an abundant number, since it is smaller than the sum of its proper divisors (65882796).

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

28949844 is a wasteful number, since it uses less digits than its factorization.

28949844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 156 counting only the distinct ones).

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

The square root of 28949844 is about 5380.5059241674. The cubic root of 28949844 is about 307.0544595285.

The spelling of 28949844 in words is "twenty-eight million, nine hundred forty-nine thousand, eight hundred forty-four".