1138933786 has 4 divisors (see below), whose sum is σ = 1708400682. Its totient is φ = 569466892.

The previous prime is 1138933759. The next prime is 1138933811. The reversal of 1138933786 is 6873398311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1107225625 + 31708161 = 33275^2 + 5631^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284733445 + ... + 284733448.

Almost surely, 2^1138933786 is an apocalyptic number.

1138933786 is a deficient number, since it is larger than the sum of its proper divisors (569466896).

1138933786 is an equidigital number, since it uses as much as digits as its factorization.

1138933786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569466895.

The product of its digits is 653184, while the sum is 49.

The square root of 1138933786 is about 33748.0930720537. The cubic root of 1138933786 is about 1044.3181486348.

The spelling of 1138933786 in words is "one billion, one hundred thirty-eight million, nine hundred thirty-three thousand, seven hundred eighty-six".