1138969156 has 24 divisors (see below), whose sum is σ = 2148550040. Its totient is φ = 525180672.

The previous prime is 1138969123. The next prime is 1138969157. The reversal of 1138969156 is 6519698311.

It can be written as a sum of positive squares in 4 ways, for example, as 88172100 + 1050797056 = 9390^2 + 32416^2 .

It is not an unprimeable number, because it can be changed into a prime (1138969157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48280 + ... + 67888.

Almost surely, 2^1138969156 is an apocalyptic number.

It is an amenable number.

1138969156 is a deficient number, since it is larger than the sum of its proper divisors (1009580884).

1138969156 is a wasteful number, since it uses less digits than its factorization.

1138969156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20743 (or 20741 counting only the distinct ones).

The product of its digits is 349920, while the sum is 49.

The square root of 1138969156 is about 33748.6170975938. The cubic root of 1138969156 is about 1044.3289590820.

The spelling of 1138969156 in words is "one billion, one hundred thirty-eight million, nine hundred sixty-nine thousand, one hundred fifty-six".