28212144344 has 32 divisors (see below), whose sum is σ = 53050150800. Its totient is φ = 14065497600.

The previous prime is 28212144341. The next prime is 28212144391. The reversal of 28212144344 is 44344121282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28212144341) 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, 4781204 + ... + 4787100.

Almost surely, 2^28212144344 is an apocalyptic number.

It is an amenable number.

28212144344 is a deficient number, since it is larger than the sum of its proper divisors (24838006456).

28212144344 is a wasteful number, since it uses less digits than its factorization.

28212144344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7523 (or 7519 counting only the distinct ones).

The product of its digits is 49152, while the sum is 35.

The spelling of 28212144344 in words is "twenty-eight billion, two hundred twelve million, one hundred forty-four thousand, three hundred forty-four".