1309120980 has 48 divisors (see below), whose sum is σ = 3754949184. Its totient is φ = 340583680.

The previous prime is 1309120949. The next prime is 1309121017. The reversal of 1309120980 is 890219031.

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, 263622 + ... + 268541.

It is an arithmetic number, because the mean of its divisors is an integer number (78228108).

Almost surely, 2^1309120980 is an apocalyptic number.

1309120980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1309120980 is an abundant number, since it is smaller than the sum of its proper divisors (2445828204).

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

1309120980 is a wasteful number, since it uses less digits than its factorization.

1309120980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532216 (or 532214 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1309120980 is about 36181.7769049559. The cubic root of 1309120980 is about 1093.9393912906.

The spelling of 1309120980 in words is "one billion, three hundred nine million, one hundred twenty thousand, nine hundred eighty".