1786445166 has 64 divisors (see below), whose sum is σ = 3945148416. Its totient is φ = 534799200.

The previous prime is 1786445161. The next prime is 1786445183. The reversal of 1786445166 is 6615446871.

It is a happy number.

It is a super-2 number, since 2×1786445166² = 6382772662249535112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1786445161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3172801 + ... + 3173363.

It is an arithmetic number, because the mean of its divisors is an integer number (61642944).

Almost surely, 2^1786445166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1786445166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1972574208).

1786445166 is an abundant number, since it is smaller than the sum of its proper divisors (2158703250).

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

1786445166 is a wasteful number, since it uses less digits than its factorization.

1786445166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077.

The product of its digits is 967680, while the sum is 48.

The square root of 1786445166 is about 42266.3597438909. The cubic root of 1786445166 is about 1213.3792489735.

The spelling of 1786445166 in words is "one billion, seven hundred eighty-six million, four hundred forty-five thousand, one hundred sixty-six".