209487012 has 48 divisors (see below), whose sum is σ = 559426560. Its totient is φ = 59768352.

The previous prime is 209486939. The next prime is 209487017. The reversal of 209487012 is 210784902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (209487017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79939 + ... + 82517.

It is an arithmetic number, because the mean of its divisors is an integer number (11654720).

Almost surely, 2^209487012 is an apocalyptic number.

It is an amenable number.

209487012 is an abundant number, since it is smaller than the sum of its proper divisors (349939548).

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

209487012 is a wasteful number, since it uses less digits than its factorization.

209487012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560 (or 3558 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 209487012 is about 14473.6661561610. Note that the first 3 decimals coincide. The cubic root of 209487012 is about 593.9078068891.

The spelling of 209487012 in words is "two hundred nine million, four hundred eighty-seven thousand, twelve".