28338961 has 8 divisors (see below), whose sum is σ = 32460480. Its totient is φ = 24235728.

The previous prime is 28338943. The next prime is 28339001. The reversal of 28338961 is 16983382.

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 28338961 - 2⁷ = 28338833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28338901) 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, 1066 + ... + 7603.

It is an arithmetic number, because the mean of its divisors is an integer number (4057560).

Almost surely, 2^28338961 is an apocalyptic number.

It is an amenable number.

28338961 is a deficient number, since it is larger than the sum of its proper divisors (4121519).

28338961 is an equidigital number, since it uses as much as digits as its factorization.

28338961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9143.

The product of its digits is 62208, while the sum is 40.

The square root of 28338961 is about 5323.4350752122. The cubic root of 28338961 is about 304.8793251891.

The spelling of 28338961 in words is "twenty-eight million, three hundred thirty-eight thousand, nine hundred sixty-one".