1171110990 has 64 divisors (see below), whose sum is σ = 3231991296. Its totient is φ = 266032512.

The previous prime is 1171110989. The next prime is 1171111009. The reversal of 1171110990 is 990111711.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17124 + ... + 51336.

It is an arithmetic number, because the mean of its divisors is an integer number (50499864).

Almost surely, 2^1171110990 is an apocalyptic number.

1171110990 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 1171110990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1615995648).

1171110990 is an abundant number, since it is smaller than the sum of its proper divisors (2060880306).

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

1171110990 is a wasteful number, since it uses less digits than its factorization.

1171110990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34393.

The product of its (nonzero) digits is 567, while the sum is 30.

The square root of 1171110990 is about 34221.4989443771. The cubic root of 1171110990 is about 1054.0616650212.

The spelling of 1171110990 in words is "one billion, one hundred seventy-one million, one hundred ten thousand, nine hundred ninety".