1306971648 has 60 divisors (see below), whose sum is σ = 3772021968. Its totient is φ = 435655680.

The previous prime is 1306971647. The next prime is 1306971661. The reversal of 1306971648 is 8461796031.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306971647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 137208 + ... + 146423.

Almost surely, 2^1306971648 is an apocalyptic number.

1306971648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1306971648 is an abundant number, since it is smaller than the sum of its proper divisors (2465050320).

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

1306971648 is an equidigital number, since it uses as much as digits as its factorization.

1306971648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283655 (or 283636 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1306971648 is about 36152.0628457077. The cubic root of 1306971648 is about 1093.3403820023.

The spelling of 1306971648 in words is "one billion, three hundred six million, nine hundred seventy-one thousand, six hundred forty-eight".