209012992 has 36 divisors (see below), whose sum is σ = 420050176. Its totient is φ = 103795200.

The previous prime is 209012953. The next prime is 209013043. The reversal of 209012992 is 299210902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35953 + ... + 41359.

Almost surely, 2^209012992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209012992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210025088).

209012992 is an abundant number, since it is smaller than the sum of its proper divisors (211037184).

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

209012992 is an equidigital number, since it uses as much as digits as its factorization.

209012992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5574 (or 5560 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 209012992 is about 14457.2816255339. The cubic root of 209012992 is about 593.4595105415.

The spelling of 209012992 in words is "two hundred nine million, twelve thousand, nine hundred ninety-two".