28913326658 has 4 divisors (see below), whose sum is σ = 43369989990. Its totient is φ = 14456663328.

The previous prime is 28913326609. The next prime is 28913326669. The reversal of 28913326658 is 85662331982.

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., 28714319209 + 199007449 = 169453^2 + 14107^2 .

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, 7228331663 + ... + 7228331666.

Almost surely, 2^28913326658 is an apocalyptic number.

28913326658 is a deficient number, since it is larger than the sum of its proper divisors (14456663332).

28913326658 is a wasteful number, since it uses less digits than its factorization.

28913326658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14456663331.

The product of its digits is 3732480, while the sum is 53.

The spelling of 28913326658 in words is "twenty-eight billion, nine hundred thirteen million, three hundred twenty-six thousand, six hundred fifty-eight".