28936989895 has 16 divisors (see below), whose sum is σ = 37897113600. Its totient is φ = 21036215200.

The previous prime is 28936989883. The next prime is 28936989899. The reversal of 28936989895 is 59898963982.

It is not a de Polignac number, because 28936989895 - 2⁹ = 28936989383 is a prime.

It is a super-2 number, since 2×28936989895² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28936989899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22290 + ... + 241600.

It is an arithmetic number, because the mean of its divisors is an integer number (2368569600).

Almost surely, 2^28936989895 is an apocalyptic number.

28936989895 is a deficient number, since it is larger than the sum of its proper divisors (8960123705).

28936989895 is a wasteful number, since it uses less digits than its factorization.

28936989895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221726.

The product of its digits is 604661760, while the sum is 76.

The spelling of 28936989895 in words is "twenty-eight billion, nine hundred thirty-six million, nine hundred eighty-nine thousand, eight hundred ninety-five".