28211564839936 has 33 divisors (see below), whose sum is σ = 56395919092831. Its totient is φ = 14105697436672.

The previous prime is 28211564839901. The next prime is 28211564839937. The reversal of 28211564839936 is 63993846511282.

The square root of 28211564839936 is 5311456.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28211564839937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 169883601 + ... + 170049583.

Almost surely, 2^{28211564839936} is an apocalyptic number.

28211564839936 is the 5311456-th square number.

It is an amenable number.

28211564839936 is a deficient number, since it is larger than the sum of its proper divisors (28184354252895).

28211564839936 is an frugal number, since it uses more digits than its factorization.

28211564839936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331986 (or 165985 counting only the distinct ones).

The product of its digits is 134369280, while the sum is 67.

The spelling of 28211564839936 in words is "twenty-eight trillion, two hundred eleven billion, five hundred sixty-four million, eight hundred thirty-nine thousand, nine hundred thirty-six".