28207104 has 48 divisors (see below), whose sum is σ = 75216960. Its totient is φ = 9400320.

The previous prime is 28207103. The next prime is 28207141. The reversal of 28207104 is 40170282.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (28207103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3849 + ... + 8439.

It is an arithmetic number, because the mean of its divisors is an integer number (1567020).

Almost surely, 2^28207104 is an apocalyptic number.

28207104 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 28207104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37608480).

28207104 is an abundant number, since it is smaller than the sum of its proper divisors (47009856).

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

28207104 is an equidigital number, since it uses as much as digits as its factorization.

28207104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4616 (or 4596 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 28207104 is about 5311.0360571173. The cubic root of 28207104 is about 304.4057370924.

Adding to 28207104 its reverse (40170282), we get a palindrome (68377386).

The spelling of 28207104 in words is "twenty-eight million, two hundred seven thousand, one hundred four".