1827221956 has 36 divisors (see below), whose sum is σ = 3733950528. Its totient is φ = 780095568.

The previous prime is 1827221951. The next prime is 1827221971. The reversal of 1827221956 is 6591227281.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1827221951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33825 + ... + 69271.

It is an arithmetic number, because the mean of its divisors is an integer number (103720848).

Almost surely, 2^1827221956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1827221956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866975264).

1827221956 is an abundant number, since it is smaller than the sum of its proper divisors (1906728572).

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

1827221956 is a wasteful number, since it uses less digits than its factorization.

1827221956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35728 (or 35719 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 1827221956 is about 42746.0168436780. The cubic root of 1827221956 is about 1222.5419444934.

The spelling of 1827221956 in words is "one billion, eight hundred twenty-seven million, two hundred twenty-one thousand, nine hundred fifty-six".