28491841 has 8 divisors (see below), whose sum is σ = 32603904. Its totient is φ = 24390240.

The previous prime is 28491839. The next prime is 28491851. The reversal of 28491841 is 14819482.

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

It is not a de Polignac number, because 28491841 - 2¹ = 28491839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28491841.

It is not an unprimeable number, because it can be changed into a prime (28491851) 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, 4536 + ... + 8806.

It is an arithmetic number, because the mean of its divisors is an integer number (4075488).

Almost surely, 2^28491841 is an apocalyptic number.

It is an amenable number.

28491841 is a deficient number, since it is larger than the sum of its proper divisors (4112063).

28491841 is an equidigital number, since it uses as much as digits as its factorization.

28491841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231.

The product of its digits is 18432, while the sum is 37.

The square root of 28491841 is about 5337.7749109531. The cubic root of 28491841 is about 305.4265857382.

The spelling of 28491841 in words is "twenty-eight million, four hundred ninety-one thousand, eight hundred forty-one".