1307128384 has 28 divisors (see below), whose sum is σ = 2597888124. Its totient is φ = 652542464.

The previous prime is 1307128379. The next prime is 1307128411. The reversal of 1307128384 is 4838217031.

It can be written as a sum of positive squares in 2 ways, for example, as 523128384 + 784000000 = 22872^2 + 28000^2 .

It is a super-2 number, since 2×1307128384² = 3417169224516902912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26154 + ... + 57430.

Almost surely, 2^1307128384 is an apocalyptic number.

It is an amenable number.

1307128384 is a deficient number, since it is larger than the sum of its proper divisors (1290759740).

1307128384 is an equidigital number, since it uses as much as digits as its factorization.

1307128384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31942 (or 31932 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1307128384 is about 36154.2305131778. The cubic root of 1307128384 is about 1093.3840858191.

The spelling of 1307128384 in words is "one billion, three hundred seven million, one hundred twenty-eight thousand, three hundred eighty-four".