1980081306 has 48 divisors (see below), whose sum is σ = 5022658368. Its totient is φ = 551937600.

The previous prime is 1980081287. The next prime is 1980081319. The reversal of 1980081306 is 6031800891.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186480 + ... + 196811.

It is an arithmetic number, because the mean of its divisors is an integer number (104638716).

Almost surely, 2^1980081306 is an apocalyptic number.

1980081306 is an abundant number, since it is smaller than the sum of its proper divisors (3042577062).

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

1980081306 is a wasteful number, since it uses less digits than its factorization.

1980081306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383347 (or 383344 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1980081306 is about 44498.1045214288. The cubic root of 1980081306 is about 1255.7244233771.

The spelling of 1980081306 in words is "one billion, nine hundred eighty million, eighty-one thousand, three hundred six".