1166788890 has 24 divisors (see below), whose sum is σ = 3033651348. Its totient is φ = 311143680.

The previous prime is 1166788837. The next prime is 1166788891. The reversal of 1166788890 is 988876611.

It can be written as a sum of positive squares in 2 ways, for example, as 1049954409 + 116834481 = 32403^2 + 10809^2 .

It is a super-2 number, since 2×1166788890² = 2722792627654864200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1166788891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6482071 + ... + 6482250.

Almost surely, 2^1166788890 is an apocalyptic number.

1166788890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1166788890 is an abundant number, since it is smaller than the sum of its proper divisors (1866862458).

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

1166788890 is a wasteful number, since it uses less digits than its factorization.

1166788890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12964334 (or 12964331 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 1166788890 is about 34158.2916727403. The cubic root of 1166788890 is about 1052.7633605412.

The spelling of 1166788890 in words is "one billion, one hundred sixty-six million, seven hundred eighty-eight thousand, eight hundred ninety".