1143335540 has 24 divisors (see below), whose sum is σ = 2408838432. Its totient is φ = 455842080.

The previous prime is 1143335533. The next prime is 1143335549. The reversal of 1143335540 is 455333411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143335549) 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, 86966 + ... + 99245.

It is an arithmetic number, because the mean of its divisors is an integer number (100368268).

Almost surely, 2^1143335540 is an apocalyptic number.

1143335540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143335540 is an abundant number, since it is smaller than the sum of its proper divisors (1265502892).

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

1143335540 is a wasteful number, since it uses less digits than its factorization.

1143335540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186527 (or 186525 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 1143335540 is about 33813.2450380025. The cubic root of 1143335540 is about 1045.6617802484.

Adding to 1143335540 its reverse (455333411), we get a palindrome (1598668951).

The spelling of 1143335540 in words is "one billion, one hundred forty-three million, three hundred thirty-five thousand, five hundred forty".