1129866540 has 144 divisors (see below), whose sum is σ = 3660840960. Its totient is φ = 259459200.

The previous prime is 1129866539. The next prime is 1129866587. The reversal of 1129866540 is 456689211.

It is a junction number, because it is equal to n+sod(n) for n = 1129866492 and 1129866501.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 133845 + ... + 142035.

Almost surely, 2^1129866540 is an apocalyptic number.

1129866540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1129866540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1830420480).

1129866540 is an abundant number, since it is smaller than the sum of its proper divisors (2530974420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1129866540 is a wasteful number, since it uses less digits than its factorization.

1129866540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8244 (or 8231 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 1129866540 is about 33613.4874715493. The cubic root of 1129866540 is about 1041.5394299915.

The spelling of 1129866540 in words is "one billion, one hundred twenty-nine million, eight hundred sixty-six thousand, five hundred forty".