38987182728 has 96 divisors (see below), whose sum is σ = 114393988800. Its totient is φ = 11924175744.

The previous prime is 38987182727. The next prime is 38987182733. The reversal of 38987182728 is 82728178983.

38987182728 is a `hidden beast` number, since 389 + 8 + 7 + 182 + 72 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (38987182727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31603 + ... + 281021.

It is an arithmetic number, because the mean of its divisors is an integer number (1191604050).

Almost surely, 2^38987182728 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 38987182728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57196994400).

38987182728 is an abundant number, since it is smaller than the sum of its proper divisors (75406806072).

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

38987182728 is a wasteful number, since it uses less digits than its factorization.

38987182728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249611 (or 249604 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 63.

The spelling of 38987182728 in words is "thirty-eight billion, nine hundred eighty-seven million, one hundred eighty-two thousand, seven hundred twenty-eight".