1166178390 has 128 divisors (see below), whose sum is σ = 3188989440. Its totient is φ = 270563328.

The previous prime is 1166178347. The next prime is 1166178439. The reversal of 1166178390 is 938716611.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 2496937 + ... + 2497403.

It is an arithmetic number, because the mean of its divisors is an integer number (24913980).

Almost surely, 2^1166178390 is an apocalyptic number.

1166178390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1166178390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1594494720).

1166178390 is an abundant number, since it is smaller than the sum of its proper divisors (2022811050).

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

1166178390 is a wasteful number, since it uses less digits than its factorization.

1166178390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1166178390 is about 34149.3541666603. The cubic root of 1166178390 is about 1052.5797157347.

The spelling of 1166178390 in words is "one billion, one hundred sixty-six million, one hundred seventy-eight thousand, three hundred ninety".