1161323290 has 8 divisors (see below), whose sum is σ = 2090381940. Its totient is φ = 464529312.

The previous prime is 1161323281. The next prime is 1161323321. The reversal of 1161323290 is 923231611.

It can be written as a sum of positive squares in 2 ways, for example, as 1104033529 + 57289761 = 33227^2 + 7569^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58066155 + ... + 58066174.

Almost surely, 2^1161323290 is an apocalyptic number.

1161323290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161323290 is a deficient number, since it is larger than the sum of its proper divisors (929058650).

1161323290 is a wasteful number, since it uses less digits than its factorization.

1161323290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116132336.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1161323290 is about 34078.1937608201. The cubic root of 1161323290 is about 1051.1169640632.

The spelling of 1161323290 in words is "one billion, one hundred sixty-one million, three hundred twenty-three thousand, two hundred ninety".