1209045882 has 64 divisors (see below), whose sum is σ = 2798613504. Its totient is φ = 344144640.

The previous prime is 1209045863. The next prime is 1209045883. The reversal of 1209045882 is 2885409021.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1209045882.

It is not an unprimeable number, because it can be changed into a prime (1209045883) 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, 927243 + ... + 928545.

It is an arithmetic number, because the mean of its divisors is an integer number (43728336).

Almost surely, 2^1209045882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209045882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399306752).

1209045882 is an abundant number, since it is smaller than the sum of its proper divisors (1589567622).

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

1209045882 is a wasteful number, since it uses less digits than its factorization.

1209045882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 1209045882 is about 34771.3370752406. The cubic root of 1209045882 is about 1065.3220776408.

The spelling of 1209045882 in words is "one billion, two hundred nine million, forty-five thousand, eight hundred eighty-two".