1143649892 has 72 divisors (see below), whose sum is σ = 2595479040. Its totient is φ = 431164800.

The previous prime is 1143649849. The next prime is 1143649921. The reversal of 1143649892 is 2989463411.

It is a super-2 number, since 2×1143649892² = 2615870150943223328, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 99584 + ... + 110472.

It is an arithmetic number, because the mean of its divisors is an integer number (36048320).

Almost surely, 2^1143649892 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143649892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1297739520).

1143649892 is an abundant number, since it is smaller than the sum of its proper divisors (1451829148).

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

1143649892 is a wasteful number, since it uses less digits than its factorization.

1143649892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10953 (or 10940 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 1143649892 is about 33817.8930745249. The cubic root of 1143649892 is about 1045.7576038977.

The spelling of 1143649892 in words is "one billion, one hundred forty-three million, six hundred forty-nine thousand, eight hundred ninety-two".