1181442690 has 24 divisors (see below), whose sum is σ = 3071751228. Its totient is φ = 315051360.

The previous prime is 1181442631. The next prime is 1181442701. The reversal of 1181442690 is 962441811.

It can be written as a sum of positive squares in 2 ways, for example, as 1173131001 + 8311689 = 34251^2 + 2883^2 .

It is a super-2 number, since 2×1181442690² = 2791613659508872200, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 6563481 + ... + 6563660.

Almost surely, 2^1181442690 is an apocalyptic number.

1181442690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1181442690 is an abundant number, since it is smaller than the sum of its proper divisors (1890308538).

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

1181442690 is a wasteful number, since it uses less digits than its factorization.

1181442690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13127154 (or 13127151 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1181442690 is about 34372.1208248778. The cubic root of 1181442690 is about 1057.1522857954.

The spelling of 1181442690 in words is "one billion, one hundred eighty-one million, four hundred forty-two thousand, six hundred ninety".