28104401 has 8 divisors (see below), whose sum is σ = 31859520. Its totient is φ = 24576912.

The previous prime is 28104389. The next prime is 28104437. The reversal of 28104401 is 10440182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28104401 - 2⁶ = 28104337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28104701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56645 + ... + 57138.

It is an arithmetic number, because the mean of its divisors is an integer number (3982440).

Almost surely, 2^28104401 is an apocalyptic number.

It is an amenable number.

28104401 is a deficient number, since it is larger than the sum of its proper divisors (3755119).

28104401 is a wasteful number, since it uses less digits than its factorization.

28104401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113815.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 28104401 is about 5301.3584108226. The cubic root of 28104401 is about 304.0358373321.

Adding to 28104401 its reverse (10440182), we get a palindrome (38544583).

The spelling of 28104401 in words is "twenty-eight million, one hundred four thousand, four hundred one".