28627420634 has 4 divisors (see below), whose sum is σ = 42941130954. Its totient is φ = 14313710316.

The previous prime is 28627420607. The next prime is 28627420643. The reversal of 28627420634 is 43602472682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15263367025 + 13364053609 = 123545^2 + 115603^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7156855157 + ... + 7156855160.

Almost surely, 2^28627420634 is an apocalyptic number.

28627420634 is a deficient number, since it is larger than the sum of its proper divisors (14313710320).

28627420634 is a wasteful number, since it uses less digits than its factorization.

28627420634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14313710319.

The product of its (nonzero) digits is 774144, while the sum is 44.

The spelling of 28627420634 in words is "twenty-eight billion, six hundred twenty-seven million, four hundred twenty thousand, six hundred thirty-four".