208525820 has 24 divisors (see below), whose sum is σ = 456944544. Its totient is φ = 79783616.

The previous prime is 208525813. The next prime is 208525897. The reversal of 208525820 is 28525802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226199 + ... + 227118.

It is an arithmetic number, because the mean of its divisors is an integer number (19039356).

Almost surely, 2^208525820 is an apocalyptic number.

208525820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208525820 is an abundant number, since it is smaller than the sum of its proper divisors (248418724).

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

208525820 is a wasteful number, since it uses less digits than its factorization.

208525820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453349 (or 453347 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 208525820 is about 14440.4231239947. The cubic root of 208525820 is about 592.9980690910.

The spelling of 208525820 in words is "two hundred eight million, five hundred twenty-five thousand, eight hundred twenty".