28804161 has 8 divisors (see below), whose sum is σ = 38496384. Its totient is φ = 19157360.

The previous prime is 28804157. The next prime is 28804183. The reversal of 28804161 is 16140882.

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 28804161 - 2² = 28804157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28804151) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9846 + ... + 12431.

It is an arithmetic number, because the mean of its divisors is an integer number (4812048).

Almost surely, 2^28804161 is an apocalyptic number.

It is an amenable number.

28804161 is a deficient number, since it is larger than the sum of its proper divisors (9692223).

28804161 is a wasteful number, since it uses less digits than its factorization.

28804161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22711.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28804161 is about 5366.9508102832. The cubic root of 28804161 is about 306.5385343463.

The spelling of 28804161 in words is "twenty-eight million, eight hundred four thousand, one hundred sixty-one".