28621869086 has 16 divisors (see below), whose sum is σ = 46425462336. Its totient is φ = 13182537216.

The previous prime is 28621869077. The next prime is 28621869091. The reversal of 28621869086 is 68096812682.

It is a super-2 number, since 2×28621869086² (a number of 22 digits) contains 22 as substring.

It is a congruent 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 in 7 ways as a sum of consecutive naturals, for example, 8953931 + ... + 8957126.

It is an arithmetic number, because the mean of its divisors is an integer number (2901591396).

Almost surely, 2^28621869086 is an apocalyptic number.

28621869086 is a deficient number, since it is larger than the sum of its proper divisors (17803593250).

28621869086 is a wasteful number, since it uses less digits than its factorization.

28621869086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17911123.

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 28621869086 in words is "twenty-eight billion, six hundred twenty-one million, eight hundred sixty-nine thousand, eighty-six".