1143205438 has 4 divisors (see below), whose sum is σ = 1714808160. Its totient is φ = 571602718.

The previous prime is 1143205421. The next prime is 1143205451. The reversal of 1143205438 is 8345023411.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285801358 + ... + 285801361.

It is an arithmetic number, because the mean of its divisors is an integer number (428702040).

Almost surely, 2^1143205438 is an apocalyptic number.

1143205438 is a deficient number, since it is larger than the sum of its proper divisors (571602722).

1143205438 is an equidigital number, since it uses as much as digits as its factorization.

1143205438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571602721.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1143205438 is about 33811.3211513540. The cubic root of 1143205438 is about 1045.6221162289.

Adding to 1143205438 its reverse (8345023411), we get a palindrome (9488228849).

The spelling of 1143205438 in words is "one billion, one hundred forty-three million, two hundred five thousand, four hundred thirty-eight".