1143931540 has 12 divisors (see below), whose sum is σ = 2402256276. Its totient is φ = 457572608.

The previous prime is 1143931511. The next prime is 1143931559. The reversal of 1143931540 is 451393411.

It can be written as a sum of positive squares in 2 ways, for example, as 799532176 + 344399364 = 28276^2 + 18558^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 28598269 + ... + 28598308.

It is an arithmetic number, because the mean of its divisors is an integer number (200188023).

Almost surely, 2^1143931540 is an apocalyptic number.

1143931540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143931540 is an abundant number, since it is smaller than the sum of its proper divisors (1258324736).

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

1143931540 is a wasteful number, since it uses less digits than its factorization.

1143931540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57196586 (or 57196584 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1143931540 is about 33822.0570042687. The cubic root of 1143931540 is about 1045.8434435019.

The spelling of 1143931540 in words is "one billion, one hundred forty-three million, nine hundred thirty-one thousand, five hundred forty".