1143695380 has 48 divisors (see below), whose sum is σ = 2440612944. Its totient is φ = 450109440.

The previous prime is 1143695351. The next prime is 1143695389. The reversal of 1143695380 is 835963411.

It can be written as a sum of positive squares in 8 ways, for example, as 84713616 + 1058981764 = 9204^2 + 32542^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143695389) 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, 865120 + ... + 866440.

It is an arithmetic number, because the mean of its divisors is an integer number (50846103).

Almost surely, 2^1143695380 is an apocalyptic number.

1143695380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143695380 is an abundant number, since it is smaller than the sum of its proper divisors (1296917564).

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

1143695380 is a wasteful number, since it uses less digits than its factorization.

1143695380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996 (or 1994 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 1143695380 is about 33818.5656112142. The cubic root of 1143695380 is about 1045.7714685112.

The spelling of 1143695380 in words is "one billion, one hundred forty-three million, six hundred ninety-five thousand, three hundred eighty".