28073219922 has 108 divisors (see below), whose sum is σ = 69429416238. Its totient is φ = 8506555200.

The previous prime is 28073219861. The next prime is 28073219947. The reversal of 28073219922 is 22991237082.

It is a happy number.

28073219922 is a `hidden beast` number, since 280 + 73 + 219 + 92 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26008335441 + 2064884481 = 161271^2 + 45441^2 .

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 53 ways as a sum of consecutive naturals, for example, 1578922 + ... + 1596602.

Almost surely, 2^28073219922 is an apocalyptic number.

28073219922 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28073219922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34714708119).

28073219922 is an abundant number, since it is smaller than the sum of its proper divisors (41356196316).

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

28073219922 is an equidigital number, since it uses as much as digits as its factorization.

28073219922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17729 (or 17697 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 28073219922 in words is "twenty-eight billion, seventy-three million, two hundred nineteen thousand, nine hundred twenty-two".