1143930285 has 24 divisors (see below), whose sum is σ = 1985794200. Its totient is φ = 609178752.

The previous prime is 1143930239. The next prime is 1143930311. The reversal of 1143930285 is 5820393411.

It can be written as a sum of positive squares in 4 ways, for example, as 331167204 + 812763081 = 18198^2 + 28509^2 .

It is not a de Polignac number, because 1143930285 - 2²⁰ = 1142881709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11691 + ... + 49239.

It is an arithmetic number, because the mean of its divisors is an integer number (82741425).

Almost surely, 2^1143930285 is an apocalyptic number.

1143930285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1143930285 is a deficient number, since it is larger than the sum of its proper divisors (841863915).

1143930285 is a wasteful number, since it uses less digits than its factorization.

1143930285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38237 (or 38234 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1143930285 is about 33822.0384512820. The cubic root of 1143930285 is about 1045.8430610391.

The spelling of 1143930285 in words is "one billion, one hundred forty-three million, nine hundred thirty thousand, two hundred eighty-five".