28840773549 has 8 divisors (see below), whose sum is σ = 43947845440. Its totient is φ = 16480442016.

The previous prime is 28840773463. The next prime is 28840773551. The reversal of 28840773549 is 94537704882.

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

It is not a de Polignac number, because 28840773549 - 2⁷ = 28840773421 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 (28840773449) 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, 686685064 + ... + 686685105.

It is an arithmetic number, because the mean of its divisors is an integer number (5493480680).

Almost surely, 2^28840773549 is an apocalyptic number.

It is an amenable number.

28840773549 is a deficient number, since it is larger than the sum of its proper divisors (15107071891).

28840773549 is a wasteful number, since it uses less digits than its factorization.

28840773549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373370179.

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 28840773549 in words is "twenty-eight billion, eight hundred forty million, seven hundred seventy-three thousand, five hundred forty-nine".