1129544640 has 336 divisors, whose sum is σ = 4546933248. Its totient is φ = 251983872.

The previous prime is 1129544573. The next prime is 1129544641. The reversal of 1129544640 is 464459211.

1129544640 is a `hidden beast` number, since 1 + 1 + 2 + 9 + 5 + 4 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1129544595 and 1129544604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129544641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 866229 + ... + 867531.

Almost surely, 2^1129544640 is an apocalyptic number.

1129544640 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 1129544640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2273466624).

1129544640 is an abundant number, since it is smaller than the sum of its proper divisors (3417388608).

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

1129544640 is a wasteful number, since it uses less digits than its factorization.

1129544640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1129544640 is about 33608.6988739523. The cubic root of 1129544640 is about 1041.4405087545.

The spelling of 1129544640 in words is "one billion, one hundred twenty-nine million, five hundred forty-four thousand, six hundred forty".