28444669 has 8 divisors (see below), whose sum is σ = 31456512. Its totient is φ = 25503840.

The previous prime is 28444657. The next prime is 28444697. The reversal of 28444669 is 96644482.

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 28444669 - 2¹⁹ = 27920381 is a prime.

It is a super-2 number, since 2×28444669² = 1618198389039122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28444469) 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, 16909 + ... + 18514.

It is an arithmetic number, because the mean of its divisors is an integer number (3932064).

Almost surely, 2^28444669 is an apocalyptic number.

It is an amenable number.

28444669 is a deficient number, since it is larger than the sum of its proper divisors (3011843).

28444669 is a wasteful number, since it uses less digits than its factorization.

28444669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35507.

The product of its digits is 331776, while the sum is 43.

The square root of 28444669 is about 5333.3543853751. The cubic root of 28444669 is about 305.2579346328.

The spelling of 28444669 in words is "twenty-eight million, four hundred forty-four thousand, six hundred sixty-nine".