1309682748 has 96 divisors (see below), whose sum is σ = 3390266880. Its totient is φ = 390205440.

The previous prime is 1309682741. The next prime is 1309682779. The reversal of 1309682748 is 8472869031.

It is a junction number, because it is equal to n+sod(n) for n = 1309682697 and 1309682706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309682741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2983113 + ... + 2983551.

It is an arithmetic number, because the mean of its divisors is an integer number (35315280).

Almost surely, 2^1309682748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1309682748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1695133440).

1309682748 is an abundant number, since it is smaller than the sum of its proper divisors (2080584132).

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

1309682748 is a wasteful number, since it uses less digits than its factorization.

1309682748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1309682748 is about 36189.5392067929. The cubic root of 1309682748 is about 1094.0958454485.

The spelling of 1309682748 in words is "one billion, three hundred nine million, six hundred eighty-two thousand, seven hundred forty-eight".