1143378684 has 72 divisors (see below), whose sum is σ = 3309371520. Its totient is φ = 326058912.

The previous prime is 1143378683. The next prime is 1143378689. The reversal of 1143378684 is 4868733411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143378683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137847 + ... + 145905.

Almost surely, 2^1143378684 is an apocalyptic number.

1143378684 is a gapful number since it is divisible by the number (14) 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 1143378684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1654685760).

1143378684 is an abundant number, since it is smaller than the sum of its proper divisors (2165992836).

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

1143378684 is a wasteful number, since it uses less digits than its factorization.

1143378684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8639 (or 8634 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 1143378684 is about 33813.8830068361. The cubic root of 1143378684 is about 1045.6749328365.

The spelling of 1143378684 in words is "one billion, one hundred forty-three million, three hundred seventy-eight thousand, six hundred eighty-four".