1138658764 has 6 divisors (see below), whose sum is σ = 1992652844. Its totient is φ = 569329380.

The previous prime is 1138658713. The next prime is 1138658767. The reversal of 1138658764 is 4678568311.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1138658767) 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 as a sum of consecutive naturals, namely, 142332342 + ... + 142332349.

Almost surely, 2^1138658764 is an apocalyptic number.

It is an amenable number.

1138658764 is a deficient number, since it is larger than the sum of its proper divisors (853994080).

1138658764 is a wasteful number, since it uses less digits than its factorization.

1138658764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284664695 (or 284664693 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 1138658764 is about 33744.0181958225. The cubic root of 1138658764 is about 1044.2340835819.

The spelling of 1138658764 in words is "one billion, one hundred thirty-eight million, six hundred fifty-eight thousand, seven hundred sixty-four".