1138539366 has 12 divisors (see below), whose sum is σ = 2466835332. Its totient is φ = 379513116.

The previous prime is 1138539359. The next prime is 1138539371. The reversal of 1138539366 is 6639358311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31626076 + ... + 31626111.

It is an arithmetic number, because the mean of its divisors is an integer number (205569611).

Almost surely, 2^1138539366 is an apocalyptic number.

1138539366 is an abundant number, since it is smaller than the sum of its proper divisors (1328295966).

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

1138539366 is a wasteful number, since it uses less digits than its factorization.

1138539366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63252195 (or 63252192 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 1138539366 is about 33742.2489766168. The cubic root of 1138539366 is about 1044.1975833815.

The spelling of 1138539366 in words is "one billion, one hundred thirty-eight million, five hundred thirty-nine thousand, three hundred sixty-six".