1309643480 has 64 divisors (see below), whose sum is σ = 3055968000. Its totient is φ = 504523264.

The previous prime is 1309643459. The next prime is 1309643497. The reversal of 1309643480 is 843469031.

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, 554462 + ... + 556818.

It is an arithmetic number, because the mean of its divisors is an integer number (47749500).

Almost surely, 2^1309643480 is an apocalyptic number.

1309643480 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 1309643480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1527984000).

1309643480 is an abundant number, since it is smaller than the sum of its proper divisors (1746324520).

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

1309643480 is a wasteful number, since it uses less digits than its factorization.

1309643480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876 (or 2872 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 1309643480 is about 36188.9966702588. The cubic root of 1309643480 is about 1094.0849106413.

The spelling of 1309643480 in words is "one billion, three hundred nine million, six hundred forty-three thousand, four hundred eighty".