28444002684 has 24 divisors (see below), whose sum is σ = 66378195408. Its totient is φ = 9480069120.

The previous prime is 28444002667. The next prime is 28444002737. The reversal of 28444002684 is 48620044482.

It is a happy number.

It is a super-2 number, since 2×28444002684² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62127 + ... + 246470.

It is an arithmetic number, because the mean of its divisors is an integer number (2765758142).

Almost surely, 2^28444002684 is an apocalyptic number.

It is an amenable number.

28444002684 is an abundant number, since it is smaller than the sum of its proper divisors (37934192724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28444002684 is a wasteful number, since it uses less digits than its factorization.

28444002684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316285 (or 316283 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 42.

The spelling of 28444002684 in words is "twenty-eight billion, four hundred forty-four million, two thousand, six hundred eighty-four".