1131952866 has 64 divisors (see below), whose sum is σ = 2600294400. Its totient is φ = 325149440.

The previous prime is 1131952847. The next prime is 1131952883. The reversal of 1131952866 is 6682591311.

It is a super-2 number, since 2×1131952866² = 2562634581691227912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168235 + ... + 174833.

It is an arithmetic number, because the mean of its divisors is an integer number (40629600).

Almost surely, 2^1131952866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131952866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1300147200).

1131952866 is an abundant number, since it is smaller than the sum of its proper divisors (1468341534).

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

1131952866 is a wasteful number, since it uses less digits than its factorization.

1131952866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6751.

The product of its digits is 77760, while the sum is 42.

The square root of 1131952866 is about 33644.5072188611. The cubic root of 1131952866 is about 1042.1801117572.

The spelling of 1131952866 in words is "one billion, one hundred thirty-one million, nine hundred fifty-two thousand, eight hundred sixty-six".