208080040420 has 96 divisors (see below), whose sum is σ = 506903443200. Its totient is φ = 70275878400.

The previous prime is 208080040397. The next prime is 208080040451. The reversal of 208080040420 is 24040080802.

It is a Harshad number since it is a multiple of its sum of digits (28).

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 31 ways as a sum of consecutive naturals, for example, 2748231 + ... + 2822929.

It is an arithmetic number, because the mean of its divisors is an integer number (5280244200).

Almost surely, 2^208080040420 is an apocalyptic number.

208080040420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208080040420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253451721600).

208080040420 is an abundant number, since it is smaller than the sum of its proper divisors (298823402780).

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

208080040420 is a wasteful number, since it uses less digits than its factorization.

208080040420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75013 (or 75011 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The spelling of 208080040420 in words is "two hundred eight billion, eighty million, forty thousand, four hundred twenty".