1306394880 has 432 divisors, whose sum is σ = 4982814144. Its totient is φ = 290734080.

The previous prime is 1306394867. The next prime is 1306394891. The reversal of 1306394880 is 884936031.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 47 ways as a sum of consecutive naturals, for example, 9972415 + ... + 9972545.

It is an arithmetic number, because the mean of its divisors is an integer number (11534292).

Almost surely, 2^1306394880 is an apocalyptic number.

1306394880 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 1306394880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2491407072).

1306394880 is an abundant number, since it is smaller than the sum of its proper divisors (3676419264).

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

1306394880 is a wasteful number, since it uses less digits than its factorization.

1306394880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1306394880 is about 36144.0849932600. The cubic root of 1306394880 is about 1093.1795275744.

The spelling of 1306394880 in words is "one billion, three hundred six million, three hundred ninety-four thousand, eight hundred eighty".