28099801422 has 128 divisors (see below), whose sum is σ = 79663288320. Its totient is φ = 7128868320.

The previous prime is 28099801403. The next prime is 28099801447. The reversal of 28099801422 is 22410899082.

It is a happy number.

It is a super-3 number, since 3×28099801422³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 100213 + ... + 257375.

It is an arithmetic number, because the mean of its divisors is an integer number (622369440).

Almost surely, 2^28099801422 is an apocalyptic number.

28099801422 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 28099801422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39831644160).

28099801422 is an abundant number, since it is smaller than the sum of its proper divisors (51563486898).

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

28099801422 is a wasteful number, since it uses less digits than its factorization.

28099801422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157235 (or 157229 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 28099801422 in words is "twenty-eight billion, ninety-nine million, eight hundred one thousand, four hundred twenty-two".