1138938288 has 80 divisors (see below), whose sum is σ = 3090206976. Its totient is φ = 360771840.

The previous prime is 1138938287. The next prime is 1138938313. The reversal of 1138938288 is 8828398311.

It is a self number, because there is not a number n which added to its sum of digits gives 1138938288.

It is not an unprimeable number, because it can be changed into a prime (1138938287) 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, 170043 + ... + 176613.

Almost surely, 2^1138938288 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 1138938288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1545103488).

1138938288 is an abundant number, since it is smaller than the sum of its proper divisors (1951268688).

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

1138938288 is a wasteful number, since it uses less digits than its factorization.

1138938288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762 (or 6756 counting only the distinct ones).

The product of its digits is 663552, while the sum is 51.

The square root of 1138938288 is about 33748.1597720528. The cubic root of 1138938288 is about 1044.3195246335.

The spelling of 1138938288 in words is "one billion, one hundred thirty-eight million, nine hundred thirty-eight thousand, two hundred eighty-eight".