209068992 has 224 divisors, whose sum is σ = 711037440. Its totient is φ = 59535360.

The previous prime is 209068973. The next prime is 209068999. The reversal of 209068992 is 299860902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209068999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322813 + ... + 323459.

Almost surely, 2^209068992 is an apocalyptic number.

209068992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209068992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355518720).

209068992 is an abundant number, since it is smaller than the sum of its proper divisors (501968448).

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

209068992 is a wasteful number, since it uses less digits than its factorization.

209068992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 209068992 is about 14459.2182361288. The cubic root of 209068992 is about 593.5125068723.

The spelling of 209068992 in words is "two hundred nine million, sixty-eight thousand, nine hundred ninety-two".