28814004 has 36 divisors (see below), whose sum is σ = 75187840. Its totient is φ = 9294480.

The previous prime is 28814003. The next prime is 28814029. The reversal of 28814004 is 40041882.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28814003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11794 + ... + 14025.

Almost surely, 2^28814004 is an apocalyptic number.

It is an amenable number.

28814004 is an abundant number, since it is smaller than the sum of its proper divisors (46373836).

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

28814004 is a wasteful number, since it uses less digits than its factorization.

28814004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25860 (or 25855 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 28814004 is about 5367.8677330948. The cubic root of 28814004 is about 306.5734473018.

Adding to 28814004 its reverse (40041882), we get a palindrome (68855886).

The spelling of 28814004 in words is "twenty-eight million, eight hundred fourteen thousand, four".