209290452 has 24 divisors (see below), whose sum is σ = 558108096. Its totient is φ = 59797248.

The previous prime is 209290439. The next prime is 209290507. The reversal of 209290452 is 254092902.

It is a congruent number.

It is an unprimeable number.

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, 1245693 + ... + 1245860.

It is an arithmetic number, because the mean of its divisors is an integer number (23254504).

Almost surely, 2^209290452 is an apocalyptic number.

It is an amenable number.

209290452 is an abundant number, since it is smaller than the sum of its proper divisors (348817644).

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

209290452 is a wasteful number, since it uses less digits than its factorization.

209290452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491567 (or 2491565 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 209290452 is about 14466.8742995852. The cubic root of 209290452 is about 593.7219957688.

The spelling of 209290452 in words is "two hundred nine million, two hundred ninety thousand, four hundred fifty-two".