1306623328 has 48 divisors (see below), whose sum is σ = 2657627280. Its totient is φ = 631881216.

The previous prime is 1306623313. The next prime is 1306623337. The reversal of 1306623328 is 8233266031.

It is a junction number, because it is equal to n+sod(n) for n = 1306623293 and 1306623302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201643 + ... + 208021.

It is an arithmetic number, because the mean of its divisors is an integer number (55367235).

Almost surely, 2^1306623328 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 1306623328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328813640).

1306623328 is an abundant number, since it is smaller than the sum of its proper divisors (1351003952).

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

1306623328 is a wasteful number, since it uses less digits than its factorization.

1306623328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6599 (or 6591 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 1306623328 is about 36147.2450955809. The cubic root of 1306623328 is about 1093.2432449401.

Adding to 1306623328 its reverse (8233266031), we get a palindrome (9539889359).

The spelling of 1306623328 in words is "one billion, three hundred six million, six hundred twenty-three thousand, three hundred twenty-eight".