1306877680 has 20 divisors (see below), whose sum is σ = 3038490792. Its totient is φ = 522751040.

The previous prime is 1306877597. The next prime is 1306877681. The reversal of 1306877680 is 867786031.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 1306877680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306877681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8167906 + ... + 8168065.

Almost surely, 2^1306877680 is an apocalyptic number.

1306877680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1306877680 is an abundant number, since it is smaller than the sum of its proper divisors (1731613112).

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

1306877680 is a wasteful number, since it uses less digits than its factorization.

1306877680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16335984 (or 16335978 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 1306877680 is about 36150.7632007956. The cubic root of 1306877680 is about 1093.3141785593.

The spelling of 1306877680 in words is "one billion, three hundred six million, eight hundred seventy-seven thousand, six hundred eighty".