1129189888 has 20 divisors (see below), whose sum is σ = 2256175350. Its totient is φ = 564594688.

The previous prime is 1129189883. The next prime is 1129189909. The reversal of 1129189888 is 8889819211.

It can be written as a sum of positive squares in only one way, i.e., 1100116224 + 29073664 = 33168^2 + 5392^2 .

It is a super-2 number, since 2×1129189888² = 2550139606322905088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1129189883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102213 + ... + 1103236.

Almost surely, 2^1129189888 is an apocalyptic number.

It is an amenable number.

1129189888 is a deficient number, since it is larger than the sum of its proper divisors (1126985462).

1129189888 is an frugal number, since it uses more digits than its factorization.

1129189888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205467 (or 2205451 counting only the distinct ones).

The product of its digits is 663552, while the sum is 55.

The square root of 1129189888 is about 33603.4207782482. The cubic root of 1129189888 is about 1041.3314701872.

The spelling of 1129189888 in words is "one billion, one hundred twenty-nine million, one hundred eighty-nine thousand, eight hundred eighty-eight".