208138426 has 16 divisors (see below), whose sum is σ = 332337600. Its totient is φ = 97482528.

The previous prime is 208138421. The next prime is 208138439. The reversal of 208138426 is 624831802.

It is a junction number, because it is equal to n+sod(n) for n = 208138391 and 208138400.

It is not an unprimeable number, because it can be changed into a prime (208138421) 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, 27390 + ... + 34153.

It is an arithmetic number, because the mean of its divisors is an integer number (20771100).

Almost surely, 2^208138426 is an apocalyptic number.

208138426 is a deficient number, since it is larger than the sum of its proper divisors (124199174).

208138426 is a wasteful number, since it uses less digits than its factorization.

208138426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61653.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 208138426 is about 14427.0033617519. The cubic root of 208138426 is about 592.6306225091.

The spelling of 208138426 in words is "two hundred eight million, one hundred thirty-eight thousand, four hundred twenty-six".