28121201448 has 64 divisors (see below), whose sum is σ = 71235581760. Its totient is φ = 9249662976.

The previous prime is 28121201393. The next prime is 28121201473. The reversal of 28121201448 is 84410212182.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1738936 + ... + 1755032.

It is an arithmetic number, because the mean of its divisors is an integer number (1113055965).

Almost surely, 2^28121201448 is an apocalyptic number.

It is an amenable number.

28121201448 is an abundant number, since it is smaller than the sum of its proper divisors (43114380312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28121201448 is a wasteful number, since it uses less digits than its factorization.

28121201448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17066 (or 17062 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The spelling of 28121201448 in words is "twenty-eight billion, one hundred twenty-one million, two hundred one thousand, four hundred forty-eight".