28441391 has 8 divisors (see below), whose sum is σ = 32852304. Its totient is φ = 24334720.

The previous prime is 28441379. The next prime is 28441397. The reversal of 28441391 is 19314482.

It is a happy number.

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 28441391 - 2⁶ = 28441327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28441397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75860 + ... + 76233.

It is an arithmetic number, because the mean of its divisors is an integer number (4106538).

Almost surely, 2^28441391 is an apocalyptic number.

28441391 is a deficient number, since it is larger than the sum of its proper divisors (4410913).

28441391 is a wasteful number, since it uses less digits than its factorization.

28441391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152121.

The product of its digits is 6912, while the sum is 32.

The square root of 28441391 is about 5333.0470652339. The cubic root of 28441391 is about 305.2462080775.

The spelling of 28441391 in words is "twenty-eight million, four hundred forty-one thousand, three hundred ninety-one".