208966620 has 48 divisors (see below), whose sum is σ = 585775008. Its totient is φ = 55660800.

The previous prime is 208966619. The next prime is 208966631. The reversal of 208966620 is 26669802.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 76722 + ... + 79398.

It is an arithmetic number, because the mean of its divisors is an integer number (12203646).

Almost surely, 2^208966620 is an apocalyptic number.

208966620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208966620 is an abundant number, since it is smaller than the sum of its proper divisors (376808388).

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

208966620 is a wasteful number, since it uses less digits than its factorization.

208966620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990 (or 3988 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 208966620 is about 14455.6777772611. The cubic root of 208966620 is about 593.4156186290.

The spelling of 208966620 in words is "two hundred eight million, nine hundred sixty-six thousand, six hundred twenty".