1309481040 has 160 divisors (see below), whose sum is σ = 4695699456. Its totient is φ = 295672320.

The previous prime is 1309481039. The next prime is 1309481071. The reversal of 1309481040 is 401849031.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1309480989 and 1309481007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134745 + ... + 144135.

Almost surely, 2^1309481040 is an apocalyptic number.

1309481040 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 1309481040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2347849728).

1309481040 is an abundant number, since it is smaller than the sum of its proper divisors (3386218416).

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

1309481040 is a wasteful number, since it uses less digits than its factorization.

1309481040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9497 (or 9491 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1309481040 is about 36186.7522720677. The cubic root of 1309481040 is about 1094.0396742839.

The spelling of 1309481040 in words is "one billion, three hundred nine million, four hundred eighty-one thousand, forty".