1143061640 has 64 divisors (see below), whose sum is σ = 3112214400. Its totient is φ = 368851968.

The previous prime is 1143061639. The next prime is 1143061643. The reversal of 1143061640 is 461603411.

It is not an unprimeable number, because it can be changed into a prime (1143061643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115310 + ... + 124829.

It is an arithmetic number, because the mean of its divisors is an integer number (48628350).

Almost surely, 2^1143061640 is an apocalyptic number.

1143061640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143061640 is an abundant number, since it is smaller than the sum of its proper divisors (1969152760).

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

1143061640 is a wasteful number, since it uses less digits than its factorization.

1143061640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240174 (or 240170 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1143061640 is about 33809.1946073845. The cubic root of 1143061640 is about 1045.5782732272.

The spelling of 1143061640 in words is "one billion, one hundred forty-three million, sixty-one thousand, six hundred forty".