5509242728 has 128 divisors (see below), whose sum is σ = 11824496640. Its totient is φ = 2384928000.

The previous prime is 5509242677. The next prime is 5509242731. The reversal of 5509242728 is 8272429055.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42055223 + ... + 42055353.

It is an arithmetic number, because the mean of its divisors is an integer number (92378880).

Almost surely, 2^5509242728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5509242728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5912248320).

5509242728 is an abundant number, since it is smaller than the sum of its proper divisors (6315253912).

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

5509242728 is a wasteful number, since it uses less digits than its factorization.

5509242728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 5509242728 is about 74224.2731725950. The cubic root of 5509242728 is about 1766.1624036701.

The spelling of 5509242728 in words is "five billion, five hundred nine million, two hundred forty-two thousand, seven hundred twenty-eight".