28104600 has 96 divisors (see below), whose sum is σ = 89994240. Its totient is φ = 7248000.

The previous prime is 28104589. The next prime is 28104607. The reversal of 28104600 is 640182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28104607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17845 + ... + 19355.

It is an arithmetic number, because the mean of its divisors is an integer number (937440).

Almost surely, 2^28104600 is an apocalyptic number.

28104600 is a gapful number since it is divisible by the number (20) 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 28104600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44997120).

28104600 is an abundant number, since it is smaller than the sum of its proper divisors (61889640).

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

28104600 is a wasteful number, since it uses less digits than its factorization.

28104600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 28104600 is about 5301.3771795638. The cubic root of 28104600 is about 304.0365549302.

Adding to 28104600 its reverse (640182), we get a palindrome (28744782).

The spelling of 28104600 in words is "twenty-eight million, one hundred four thousand, six hundred".