28956585646 has 4 divisors (see below), whose sum is σ = 43434878472. Its totient is φ = 14478292822.

The previous prime is 28956585613. The next prime is 28956585653. The reversal of 28956585646 is 64658565982.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7239146410 + ... + 7239146413.

It is an arithmetic number, because the mean of its divisors is an integer number (10858719618).

Almost surely, 2^28956585646 is an apocalyptic number.

28956585646 is a deficient number, since it is larger than the sum of its proper divisors (14478292826).

28956585646 is a wasteful number, since it uses less digits than its factorization.

28956585646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14478292825.

The product of its digits is 124416000, while the sum is 64.

The spelling of 28956585646 in words is "twenty-eight billion, nine hundred fifty-six million, five hundred eighty-five thousand, six hundred forty-six".