1138518528 has 160 divisors (see below), whose sum is σ = 3538761600. Its totient is φ = 325140480.

The previous prime is 1138518473. The next prime is 1138518529. The reversal of 1138518528 is 8258158311.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1138518528.

It is not an unprimeable number, because it can be changed into a prime (1138518529) 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, 525768 + ... + 527928.

It is an arithmetic number, because the mean of its divisors is an integer number (22117260).

Almost surely, 2^1138518528 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 1138518528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769380800).

1138518528 is an abundant number, since it is smaller than the sum of its proper divisors (2400243072).

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

1138518528 is an frugal number, since it uses more digits than its factorization.

1138518528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203 (or 2173 counting only the distinct ones).

The product of its digits is 76800, while the sum is 42.

The square root of 1138518528 is about 33741.9401931780. The cubic root of 1138518528 is about 1044.1912129029.

The spelling of 1138518528 in words is "one billion, one hundred thirty-eight million, five hundred eighteen thousand, five hundred twenty-eight".