28208219898 has 32 divisors (see below), whose sum is σ = 57390379200. Its totient is φ = 9240515456.

The previous prime is 28208219863. The next prime is 28208219929. The reversal of 28208219898 is 89891280282.

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 15 ways as a sum of consecutive naturals, for example, 1346488 + ... + 1367276.

It is an arithmetic number, because the mean of its divisors is an integer number (1793449350).

Almost surely, 2^28208219898 is an apocalyptic number.

28208219898 is an abundant number, since it is smaller than the sum of its proper divisors (29182159302).

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

28208219898 is a wasteful number, since it uses less digits than its factorization.

28208219898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24686.

The product of its (nonzero) digits is 2654208, while the sum is 57.

The spelling of 28208219898 in words is "twenty-eight billion, two hundred eight million, two hundred nineteen thousand, eight hundred ninety-eight".