28744104 has 32 divisors (see below), whose sum is σ = 74340000. Its totient is φ = 9250752.

The previous prime is 28744097. The next prime is 28744109. The reversal of 28744104 is 40144782.

It is not an unprimeable number, because it can be changed into a prime (28744109) by changing a digit.

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, 19954 + ... + 21345.

It is an arithmetic number, because the mean of its divisors is an integer number (2323125).

Almost surely, 2^28744104 is an apocalyptic number.

28744104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28744104 is an abundant number, since it is smaller than the sum of its proper divisors (45595896).

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

28744104 is a wasteful number, since it uses less digits than its factorization.

28744104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41337 (or 41333 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 28744104 is about 5361.3528143557. The cubic root of 28744104 is about 306.3253406753.

Adding to 28744104 its reverse (40144782), we get a palindrome (68888886).

The spelling of 28744104 in words is "twenty-eight million, seven hundred forty-four thousand, one hundred four".