1131305766 has 32 divisors (see below), whose sum is σ = 2436324480. Its totient is φ = 348902016.

The previous prime is 1131305717. The next prime is 1131305803. The reversal of 1131305766 is 6675031311.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87976 + ... + 100011.

It is an arithmetic number, because the mean of its divisors is an integer number (76135140).

Almost surely, 2^1131305766 is an apocalyptic number.

1131305766 is an abundant number, since it is smaller than the sum of its proper divisors (1305018714).

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

1131305766 is a wasteful number, since it uses less digits than its factorization.

1131305766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188068.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 1131305766 is about 33634.8891182950. The cubic root of 1131305766 is about 1041.9814806066.

The spelling of 1131305766 in words is "one billion, one hundred thirty-one million, three hundred five thousand, seven hundred sixty-six".