1143649680 has 40 divisors (see below), whose sum is σ = 3545314752. Its totient is φ = 304973184.

The previous prime is 1143649679. The next prime is 1143649681. The reversal of 1143649680 is 869463411.

It is an interprime number because it is at equal distance from previous prime (1143649679) and next prime (1143649681).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1143649681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2382364 + ... + 2382843.

Almost surely, 2^1143649680 is an apocalyptic number.

1143649680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143649680 is an abundant number, since it is smaller than the sum of its proper divisors (2401665072).

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

1143649680 is a wasteful number, since it uses less digits than its factorization.

1143649680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4765223 (or 4765217 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1143649680 is about 33817.8899400894. The cubic root of 1143649680 is about 1045.7575392798.

It can be divided in two parts, 11436 and 49680, that added together give a palindrome (61116).

The spelling of 1143649680 in words is "one billion, one hundred forty-three million, six hundred forty-nine thousand, six hundred eighty".