209290980 has 48 divisors (see below), whose sum is σ = 586736640. Its totient is φ = 55742208.

The previous prime is 209290979. The next prime is 209290993. The reversal of 209290980 is 89092902.

209290980 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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63616 + ... + 66824.

It is an arithmetic number, because the mean of its divisors is an integer number (12223680).

Almost surely, 2^209290980 is an apocalyptic number.

209290980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209290980 is an abundant number, since it is smaller than the sum of its proper divisors (377445660).

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

209290980 is a wasteful number, since it uses less digits than its factorization.

209290980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4308 (or 4306 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 209290980 is about 14466.8925481597. The cubic root of 209290980 is about 593.7224950509.

The spelling of 209290980 in words is "two hundred nine million, two hundred ninety thousand, nine hundred eighty".