1138758786 has 24 divisors (see below), whose sum is σ = 2691612144. Its totient is φ = 345078360.

The previous prime is 1138758781. The next prime is 1138758811. The reversal of 1138758786 is 6878578311.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1138758781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2875456 + ... + 2875851.

It is an arithmetic number, because the mean of its divisors is an integer number (112150506).

Almost surely, 2^1138758786 is an apocalyptic number.

1138758786 is an abundant number, since it is smaller than the sum of its proper divisors (1552853358).

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

1138758786 is a wasteful number, since it uses less digits than its factorization.

1138758786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751326 (or 5751323 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 1138758786 is about 33745.5002333644. The cubic root of 1138758786 is about 1044.2646585375.

The spelling of 1138758786 in words is "one billion, one hundred thirty-eight million, seven hundred fifty-eight thousand, seven hundred eighty-six".