28239104 has 36 divisors (see below), whose sum is σ = 57591744. Its totient is φ = 13813248.

The previous prime is 28239083. The next prime is 28239131. The reversal of 28239104 is 40193282.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10859 + ... + 13205.

Almost surely, 2^28239104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28239104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28795872).

28239104 is an abundant number, since it is smaller than the sum of its proper divisors (29352640).

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

28239104 is an equidigital number, since it uses as much as digits as its factorization.

28239104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410 (or 2396 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 28239104 is about 5314.0477980538. The cubic root of 28239104 is about 304.5208062408.

The spelling of 28239104 in words is "twenty-eight million, two hundred thirty-nine thousand, one hundred four".