28444379 has 4 divisors (see below), whose sum is σ = 29213184. Its totient is φ = 27675576.

The previous prime is 28444373. The next prime is 28444393. The reversal of 28444379 is 97344482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28444379 - 2²⁰ = 27395803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28444373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384347 + ... + 384420.

It is an arithmetic number, because the mean of its divisors is an integer number (7303296).

Almost surely, 2^28444379 is an apocalyptic number.

28444379 is a deficient number, since it is larger than the sum of its proper divisors (768805).

28444379 is an equidigital number, since it uses as much as digits as its factorization.

28444379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768804.

The product of its digits is 193536, while the sum is 41.

The square root of 28444379 is about 5333.3271979131. The cubic root of 28444379 is about 305.2568972374.

The spelling of 28444379 in words is "twenty-eight million, four hundred forty-four thousand, three hundred seventy-nine".