1138866649 has 8 divisors (see below), whose sum is σ = 1155323520. Its totient is φ = 1122433056.

The previous prime is 1138866637. The next prime is 1138866667. The reversal of 1138866649 is 9466688311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138866649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1138866596 and 1138866605.

It is not an unprimeable number, because it can be changed into a prime (1138866049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108804 + ... + 118810.

It is an arithmetic number, because the mean of its divisors is an integer number (144415440).

Almost surely, 2^1138866649 is an apocalyptic number.

It is an amenable number.

1138866649 is a deficient number, since it is larger than the sum of its proper divisors (16456871).

1138866649 is a wasteful number, since it uses less digits than its factorization.

1138866649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11639.

The product of its digits is 1492992, while the sum is 52.

The square root of 1138866649 is about 33747.0983789718. The cubic root of 1138866649 is about 1044.2976283417.

The spelling of 1138866649 in words is "one billion, one hundred thirty-eight million, eight hundred sixty-six thousand, six hundred forty-nine".