28133300544 has 112 divisors (see below), whose sum is σ = 81357313536. Its totient is φ = 8541388800.

The previous prime is 28133300537. The next prime is 28133300549. The reversal of 28133300544 is 44500333182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28133300549) 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, 37837 + ... + 240204.

Almost surely, 2^28133300544 is an apocalyptic number.

28133300544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28133300544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40678656768).

28133300544 is an abundant number, since it is smaller than the sum of its proper divisors (53224012992).

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

28133300544 is a wasteful number, since it uses less digits than its factorization.

28133300544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278104 (or 278094 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 28133300544 in words is "twenty-eight billion, one hundred thirty-three million, three hundred thousand, five hundred forty-four".