1286628385 has 16 divisors (see below), whose sum is σ = 1768352256. Its totient is φ = 880342848.

The previous prime is 1286628383. The next prime is 1286628407. The reversal of 1286628385 is 5838266821.

1286628385 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1286628385 - 2¹ = 1286628383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1286628383) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23494 + ... + 55903.

It is an arithmetic number, because the mean of its divisors is an integer number (110522016).

Almost surely, 2^1286628385 is an apocalyptic number.

It is an amenable number.

1286628385 is a deficient number, since it is larger than the sum of its proper divisors (481723871).

1286628385 is an equidigital number, since it uses as much as digits as its factorization.

1286628385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79872.

The product of its digits is 1105920, while the sum is 49.

The square root of 1286628385 is about 35869.6025207975. The cubic root of 1286628385 is about 1087.6380088208.

The spelling of 1286628385 in words is "one billion, two hundred eighty-six million, six hundred twenty-eight thousand, three hundred eighty-five".