209649088 has 28 divisors (see below), whose sum is σ = 453844152. Its totient is φ = 95294720.

The previous prime is 209649061. The next prime is 209649101. The reversal of 209649088 is 880946902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148195 + ... + 149602.

Almost surely, 2^209649088 is an apocalyptic number.

It is an amenable number.

209649088 is an abundant number, since it is smaller than the sum of its proper divisors (244195064).

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

209649088 is a wasteful number, since it uses less digits than its factorization.

209649088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297820 (or 297810 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 209649088 is about 14479.2640696964. The cubic root of 209649088 is about 594.0609323535.

The spelling of 209649088 in words is "two hundred nine million, six hundred forty-nine thousand, eighty-eight".