1138578782 has 12 divisors (see below), whose sum is σ = 1877243928. Its totient is φ = 517535700.

The previous prime is 1138578703. The next prime is 1138578787. The reversal of 1138578782 is 2878758311.

It is a self number, because there is not a number n which added to its sum of digits gives 1138578782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138578787) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2352194 + ... + 2352677.

It is an arithmetic number, because the mean of its divisors is an integer number (156436994).

Almost surely, 2^1138578782 is an apocalyptic number.

1138578782 is a deficient number, since it is larger than the sum of its proper divisors (738665146).

1138578782 is a wasteful number, since it uses less digits than its factorization.

1138578782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704895 (or 4704884 counting only the distinct ones).

The product of its digits is 752640, while the sum is 50.

The square root of 1138578782 is about 33742.8330464411. The cubic root of 1138578782 is about 1044.2096332114.

The spelling of 1138578782 in words is "one billion, one hundred thirty-eight million, five hundred seventy-eight thousand, seven hundred eighty-two".