1161280238 has 4 divisors (see below), whose sum is σ = 1741920360. Its totient is φ = 580640118.

The previous prime is 1161280213. The next prime is 1161280271. The reversal of 1161280238 is 8320821611.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290320058 + ... + 290320061.

It is an arithmetic number, because the mean of its divisors is an integer number (435480090).

Almost surely, 2^1161280238 is an apocalyptic number.

1161280238 is a deficient number, since it is larger than the sum of its proper divisors (580640122).

1161280238 is an equidigital number, since it uses as much as digits as its factorization.

1161280238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580640121.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1161280238 is about 34077.5620900322. The cubic root of 1161280238 is about 1051.1039750741.

The spelling of 1161280238 in words is "one billion, one hundred sixty-one million, two hundred eighty thousand, two hundred thirty-eight".