208208820 has 48 divisors (see below), whose sum is σ = 590022720. Its totient is φ = 54852096.

The previous prime is 208208813. The next prime is 208208831. The reversal of 208208820 is 28802802.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15925 + ... + 25884.

It is an arithmetic number, because the mean of its divisors is an integer number (12292140).

Almost surely, 2^208208820 is an apocalyptic number.

208208820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208208820 is an abundant number, since it is smaller than the sum of its proper divisors (381813900).

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

208208820 is a wasteful number, since it uses less digits than its factorization.

208208820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41904 (or 41902 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 208208820 is about 14429.4428166856. The cubic root of 208208820 is about 592.6974257077.

The spelling of 208208820 in words is "two hundred eight million, two hundred eight thousand, eight hundred twenty".