1306432656 has 30 divisors (see below), whose sum is σ = 3656197350. Its totient is φ = 435477504.

The previous prime is 1306432649. The next prime is 1306432679. The reversal of 1306432656 is 6562346031.

1306432656 is a `hidden beast` number, since 1 + 3 + 0 + 643 + 2 + 6 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1248915600 + 57517056 = 35340^2 + 7584^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1306432656.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4536081 + ... + 4536368.

It is an arithmetic number, because the mean of its divisors is an integer number (121873245).

Almost surely, 2^1306432656 is an apocalyptic number.

1306432656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1306432656 is an abundant number, since it is smaller than the sum of its proper divisors (2349764694).

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

1306432656 is a wasteful number, since it uses less digits than its factorization.

1306432656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9072463 (or 9072454 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 1306432656 is about 36144.6075646147. The cubic root of 1306432656 is about 1093.1900643456.

Adding to 1306432656 its reverse (6562346031), we get a palindrome (7868778687).

The spelling of 1306432656 in words is "one billion, three hundred six million, four hundred thirty-two thousand, six hundred fifty-six".