2628693986 has 16 divisors (see below), whose sum is σ = 4218030936. Its totient is φ = 1224278016.

The previous prime is 2628693983. The next prime is 2628694021. The reversal of 2628693986 is 6893968262.

It can be written as a sum of positive squares in 4 ways, for example, as 2602938361 + 25755625 = 51019^2 + 5075^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2628693983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395231 + ... + 401826.

Almost surely, 2^2628693986 is an apocalyptic number.

2628693986 is a deficient number, since it is larger than the sum of its proper divisors (1589336950).

2628693986 is a wasteful number, since it uses less digits than its factorization.

2628693986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797173.

The product of its digits is 13436928, while the sum is 59.

The square root of 2628693986 is about 51270.7907682337. The cubic root of 2628693986 is about 1380.1088596475.

The spelling of 2628693986 in words is "two billion, six hundred twenty-eight million, six hundred ninety-three thousand, nine hundred eighty-six".