1166623992 has 128 divisors (see below), whose sum is σ = 3403008000. Its totient is φ = 369826560.

The previous prime is 1166623981. The next prime is 1166623999. The reversal of 1166623992 is 2993266611.

It is a super-2 number, since 2×1166623992² = 2722023077420032128, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166623999) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 393588 + ... + 396540.

It is an arithmetic number, because the mean of its divisors is an integer number (26586000).

Almost surely, 2^1166623992 is an apocalyptic number.

1166623992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1166623992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1701504000).

1166623992 is an abundant number, since it is smaller than the sum of its proper divisors (2236384008).

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

1166623992 is a wasteful number, since it uses less digits than its factorization.

1166623992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058 (or 3048 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 1166623992 is about 34155.8778543313. The cubic root of 1166623992 is about 1052.7137638081.

The spelling of 1166623992 in words is "one billion, one hundred sixty-six million, six hundred twenty-three thousand, nine hundred ninety-two".