209480838 has 16 divisors (see below), whose sum is σ = 478813440. Its totient is φ = 59851656.

The previous prime is 209480837. The next prime is 209480867. The reversal of 209480838 is 838084902.

It is a happy number.

209480838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 4987639 = 209480838 / (2 + 0 + 9 + 4 + 8 + 0 + 8 + 3 + 8).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 209480838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209480837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2493778 + ... + 2493861.

It is an arithmetic number, because the mean of its divisors is an integer number (29925840).

Almost surely, 2^209480838 is an apocalyptic number.

209480838 is an abundant number, since it is smaller than the sum of its proper divisors (269332602).

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

209480838 is a wasteful number, since it uses less digits than its factorization.

209480838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4987651.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 209480838 is about 14473.4528706871. The cubic root of 209480838 is about 593.9019722826.

The spelling of 209480838 in words is "two hundred nine million, four hundred eighty thousand, eight hundred thirty-eight".