28444233307 has 16 divisors (see below), whose sum is σ = 32832552960. Its totient is φ = 24137936928.

The previous prime is 28444233289. The next prime is 28444233319. The reversal of 28444233307 is 70333244482.

It is a de Polignac number, because none of the positive numbers 2^k-28444233307 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 28444233307.

It is not an unprimeable number, because it can be changed into a prime (28444233107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392433 + ... + 459229.

It is an arithmetic number, because the mean of its divisors is an integer number (2052034560).

Almost surely, 2^28444233307 is an apocalyptic number.

28444233307 is a deficient number, since it is larger than the sum of its proper divisors (4388319653).

28444233307 is a wasteful number, since it uses less digits than its factorization.

28444233307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67410.

The product of its (nonzero) digits is 387072, while the sum is 40.

Adding to 28444233307 its reverse (70333244482), we get a palindrome (98777477789).

The spelling of 28444233307 in words is "twenty-eight billion, four hundred forty-four million, two hundred thirty-three thousand, three hundred seven".