28205954418 has 32 divisors (see below), whose sum is σ = 56621721600. Its totient is φ = 9367079696.

The previous prime is 28205954417. The next prime is 28205954429. The reversal of 28205954418 is 81445950282.

It is not an unprimeable number, because it can be changed into a prime (28205954417) by changing a digit.

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, 1903723 + ... + 1918481.

It is an arithmetic number, because the mean of its divisors is an integer number (1769428800).

Almost surely, 2^28205954418 is an apocalyptic number.

28205954418 is an abundant number, since it is smaller than the sum of its proper divisors (28415767182).

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

28205954418 is a wasteful number, since it uses less digits than its factorization.

28205954418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15926.

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 28205954418 in words is "twenty-eight billion, two hundred five million, nine hundred fifty-four thousand, four hundred eighteen".