1821056160 has 384 divisors, whose sum is σ = 7402752000. Its totient is φ = 365137920.

The previous prime is 1821056141. The next prime is 1821056161. The reversal of 1821056160 is 616501281.

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

It is not an unprimeable number, because it can be changed into a prime (1821056161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1070991 + ... + 1072689.

It is an arithmetic number, because the mean of its divisors is an integer number (19278000).

Almost surely, 2^1821056160 is an apocalyptic number.

1821056160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1821056160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3701376000).

1821056160 is an abundant number, since it is smaller than the sum of its proper divisors (5581695840).

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

1821056160 is a wasteful number, since it uses less digits than its factorization.

1821056160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764 (or 1756 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 1821056160 is about 42673.8346062315. The cubic root of 1821056160 is about 1221.1652756033.

The spelling of 1821056160 in words is "one billion, eight hundred twenty-one million, fifty-six thousand, one hundred sixty".