208738473240 has 128 divisors (see below), whose sum is σ = 723329118720. Its totient is φ = 47626598400.

The previous prime is 208738473169. The next prime is 208738473241. The reversal of 208738473240 is 42374837802.

208738473240 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 208738473240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208738473241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4628596 + ... + 4673475.

It is an arithmetic number, because the mean of its divisors is an integer number (5651008740).

Almost surely, 2^208738473240 is an apocalyptic number.

208738473240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208738473240 is an abundant number, since it is smaller than the sum of its proper divisors (514590645480).

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

208738473240 is a wasteful number, since it uses less digits than its factorization.

208738473240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9302113 (or 9302109 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 48.

The spelling of 208738473240 in words is "two hundred eight billion, seven hundred thirty-eight million, four hundred seventy-three thousand, two hundred forty".