28044433813 has 8 divisors (see below), whose sum is σ = 31050554400. Its totient is φ = 25114417680.

The previous prime is 28044433801. The next prime is 28044433829. The reversal of 28044433813 is 31833444082.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28044433813 - 2²¹ = 28042336661 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 (28044443813) 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, 19025338 + ... + 19026811.

It is an arithmetic number, because the mean of its divisors is an integer number (3881319300).

Almost surely, 2^28044433813 is an apocalyptic number.

It is an amenable number.

28044433813 is a deficient number, since it is larger than the sum of its proper divisors (3006120587).

28044433813 is a wasteful number, since it uses less digits than its factorization.

28044433813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38052227.

The product of its (nonzero) digits is 221184, while the sum is 40.

Adding to 28044433813 its reverse (31833444082), we get a palindrome (59877877895).

The spelling of 28044433813 in words is "twenty-eight billion, forty-four million, four hundred thirty-three thousand, eight hundred thirteen".