1820901120 has 144 divisors (see below), whose sum is σ = 5851252512. Its totient is φ = 482590720.

The previous prime is 1820901073. The next prime is 1820901133. The reversal of 1820901120 is 211090281.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 662950 + ... + 665690.

It is an arithmetic number, because the mean of its divisors is an integer number (40633698).

Almost surely, 2^1820901120 is an apocalyptic number.

1820901120 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 1820901120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2925626256).

1820901120 is an abundant number, since it is smaller than the sum of its proper divisors (4030351392).

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

1820901120 is a wasteful number, since it uses less digits than its factorization.

1820901120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938 (or 2924 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 1820901120 is about 42672.0179977465. The cubic root of 1820901120 is about 1221.1306190046.

The spelling of 1820901120 in words is "one billion, eight hundred twenty million, nine hundred one thousand, one hundred twenty".