1122001986 has 64 divisors (see below), whose sum is σ = 2649104640. Its totient is φ = 310106880.

The previous prime is 1122001981. The next prime is 1122001987. The reversal of 1122001986 is 6891002211.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1122001981) 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, 279280 + ... + 283268.

It is an arithmetic number, because the mean of its divisors is an integer number (41392260).

Almost surely, 2^1122001986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1122001986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324552320).

1122001986 is an abundant number, since it is smaller than the sum of its proper divisors (1527102654).

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

1122001986 is a wasteful number, since it uses less digits than its factorization.

1122001986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4219.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 1122001986 is about 33496.2980939685. The cubic root of 1122001986 is about 1039.1172199427.

The spelling of 1122001986 in words is "one billion, one hundred twenty-two million, one thousand, nine hundred eighty-six".