1800225920 has 32 divisors (see below), whose sum is σ = 4303666620. Its totient is φ = 720090112.

The previous prime is 1800225907. The next prime is 1800225943. The reversal of 1800225920 is 295220081.

It can be written as a sum of positive squares in 2 ways, for example, as 1688881216 + 111344704 = 41096^2 + 10552^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405787 + ... + 1407066.

Almost surely, 2^1800225920 is an apocalyptic number.

1800225920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1800225920 is an abundant number, since it is smaller than the sum of its proper divisors (2503440700).

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

1800225920 is an equidigital number, since it uses as much as digits as its factorization.

1800225920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812872 (or 2812860 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1800225920 is about 42429.0692803884. The cubic root of 1800225920 is about 1216.4912892477.

The spelling of 1800225920 in words is "one billion, eight hundred million, two hundred twenty-five thousand, nine hundred twenty".