1138310887 has 8 divisors (see below), whose sum is σ = 1316601216. Its totient is φ = 963939192.

The previous prime is 1138310869. The next prime is 1138310897. The reversal of 1138310887 is 7880138311.

It is a happy number.

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-1138310887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138310807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 979033 + ... + 980194.

It is an arithmetic number, because the mean of its divisors is an integer number (164575152).

Almost surely, 2^1138310887 is an apocalyptic number.

1138310887 is a deficient number, since it is larger than the sum of its proper divisors (178290329).

1138310887 is an equidigital number, since it uses as much as digits as its factorization.

1138310887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959317.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 1138310887 is about 33738.8631551213. The cubic root of 1138310887 is about 1044.1277297932.

The spelling of 1138310887 in words is "one billion, one hundred thirty-eight million, three hundred ten thousand, eight hundred eighty-seven".