28135294634 has 8 divisors (see below), whose sum is σ = 42677132580. Its totient is φ = 13909583776.

The previous prime is 28135294633. The next prime is 28135294667. The reversal of 28135294634 is 43649253182.

It can be written as a sum of positive squares in 2 ways, for example, as 27554340025 + 580954609 = 165995^2 + 24103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28135294633) 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 3 ways as a sum of consecutive naturals, for example, 79031549 + ... + 79031904.

Almost surely, 2^28135294634 is an apocalyptic number.

28135294634 is a deficient number, since it is larger than the sum of its proper divisors (14541837946).

28135294634 is a wasteful number, since it uses less digits than its factorization.

28135294634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158063544.

The product of its digits is 1244160, while the sum is 47.

The spelling of 28135294634 in words is "twenty-eight billion, one hundred thirty-five million, two hundred ninety-four thousand, six hundred thirty-four".