1805120980 has 48 divisors (see below), whose sum is σ = 4085706240. Its totient is φ = 665958528.

The previous prime is 1805120971. The next prime is 1805121061. The reversal of 1805120980 is 890215081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455367 + ... + 459313.

It is an arithmetic number, because the mean of its divisors is an integer number (85118880).

Almost surely, 2^1805120980 is an apocalyptic number.

1805120980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1805120980 is an abundant number, since it is smaller than the sum of its proper divisors (2280585260).

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

1805120980 is a wasteful number, since it uses less digits than its factorization.

1805120980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5728 (or 5726 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 1805120980 is about 42486.7153355022. The cubic root of 1805120980 is about 1217.5928933334.

The spelling of 1805120980 in words is "one billion, eight hundred five million, one hundred twenty thousand, nine hundred eighty".