28345104 has 60 divisors (see below), whose sum is σ = 81278652. Its totient is φ = 9216000.

The previous prime is 28345099. The next prime is 28345157. The reversal of 28345104 is 40154382.

It can be written as a sum of positive squares in 2 ways, for example, as 7551504 + 20793600 = 2748^2 + 4560^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3504 + ... + 8304.

Almost surely, 2^28345104 is an apocalyptic number.

28345104 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 28345104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40639326).

28345104 is an abundant number, since it is smaller than the sum of its proper divisors (52933548).

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

28345104 is a wasteful number, since it uses less digits than its factorization.

28345104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4856 (or 4847 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 28345104 is about 5324.0120210232. The cubic root of 28345104 is about 304.9013530302.

Adding to 28345104 its reverse (40154382), we get a palindrome (68499486).

The spelling of 28345104 in words is "twenty-eight million, three hundred forty-five thousand, one hundred four".