17728747540 has 96 divisors (see below), whose sum is σ = 43127884800. Its totient is φ = 5996229120.

The previous prime is 17728747537. The next prime is 17728747549. The reversal of 17728747540 is 4574782771.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17728747549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3644710 + ... + 3649570.

It is an arithmetic number, because the mean of its divisors is an integer number (449248800).

Almost surely, 2^17728747540 is an apocalyptic number.

17728747540 is a gapful number since it is divisible by the number (10) 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 17728747540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21563942400).

17728747540 is an abundant number, since it is smaller than the sum of its proper divisors (25399137260).

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

17728747540 is a wasteful number, since it uses less digits than its factorization.

17728747540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5225 (or 5223 counting only the distinct ones).

The product of its (nonzero) digits is 3073280, while the sum is 52.

The spelling of 17728747540 in words is "seventeen billion, seven hundred twenty-eight million, seven hundred forty-seven thousand, five hundred forty".