28912104 has 192 divisors, whose sum is σ = 94348800. Its totient is φ = 7907328.

The previous prime is 28912099. The next prime is 28912151. The reversal of 28912104 is 40121982.

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 47 ways as a sum of consecutive naturals, for example, 365937 + ... + 366015.

It is an arithmetic number, because the mean of its divisors is an integer number (491400).

Almost surely, 2^28912104 is an apocalyptic number.

28912104 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 28912104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47174400).

28912104 is an abundant number, since it is smaller than the sum of its proper divisors (65436696).

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

28912104 is a wasteful number, since it uses less digits than its factorization.

28912104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 28912104 is about 5376.9976752831. The cubic root of 28912104 is about 306.9209726312.

The spelling of 28912104 in words is "twenty-eight million, nine hundred twelve thousand, one hundred four".