208005380 has 24 divisors (see below), whose sum is σ = 476521920. Its totient is φ = 75638240.

The previous prime is 208005377. The next prime is 208005383. The reversal of 208005380 is 83500802.

It is an interprime number because it is at equal distance from previous prime (208005377) and next prime (208005383).

It is not an unprimeable number, because it can be changed into a prime (208005383) 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, 472520 + ... + 472959.

It is an arithmetic number, because the mean of its divisors is an integer number (19855080).

Almost surely, 2^208005380 is an apocalyptic number.

208005380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208005380 is an abundant number, since it is smaller than the sum of its proper divisors (268516540).

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

208005380 is a wasteful number, since it uses less digits than its factorization.

208005380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945499 (or 945497 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 208005380 is about 14422.3916185909. The cubic root of 208005380 is about 592.5043220441.

The spelling of 208005380 in words is "two hundred eight million, five thousand, three hundred eighty".