208173420 has 288 divisors, whose sum is σ = 792529920. Its totient is φ = 43061760.

The previous prime is 208173377. The next prime is 208173421. The reversal of 208173420 is 24371802.

208173420 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (208173421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1162891 + ... + 1163069.

It is an arithmetic number, because the mean of its divisors is an integer number (2751840).

Almost surely, 2^208173420 is an apocalyptic number.

208173420 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 208173420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396264960).

208173420 is an abundant number, since it is smaller than the sum of its proper divisors (584356500).

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

208173420 is a wasteful number, since it uses less digits than its factorization.

208173420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 208173420 is about 14428.2161059502. The cubic root of 208173420 is about 592.6638333459.

The spelling of 208173420 in words is "two hundred eight million, one hundred seventy-three thousand, four hundred twenty".