28604618642 has 32 divisors (see below), whose sum is σ = 45696798000. Its totient is φ = 13382443008.

The previous prime is 28604618639. The next prime is 28604618717. The reversal of 28604618642 is 24681640682.

It is a Cunningham number, because it is equal to 169129²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 20995720201 + 7608898441 = 144899^2 + 87229^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4185284 + ... + 4192112.

Almost surely, 2^28604618642 is an apocalyptic number.

28604618642 is a deficient number, since it is larger than the sum of its proper divisors (17092179358).

28604618642 is a wasteful number, since it uses less digits than its factorization.

28604618642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7550.

The product of its (nonzero) digits is 884736, while the sum is 47.

The spelling of 28604618642 in words is "twenty-eight billion, six hundred four million, six hundred eighteen thousand, six hundred forty-two".