209429088 has 48 divisors (see below), whose sum is σ = 599731776. Its totient is φ = 63463040.

The previous prime is 209429063. The next prime is 209429089. The reversal of 209429088 is 880924902.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209429089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98106 + ... + 100217.

It is an arithmetic number, because the mean of its divisors is an integer number (12494412).

Almost surely, 2^209429088 is an apocalyptic number.

It is an amenable number.

209429088 is an abundant number, since it is smaller than the sum of its proper divisors (390302688).

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

209429088 is a wasteful number, since it uses less digits than its factorization.

209429088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198347 (or 198339 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 209429088 is about 14471.6650044147. The cubic root of 209429088 is about 593.8530625453.

The spelling of 209429088 in words is "two hundred nine million, four hundred twenty-nine thousand, eighty-eight".