209001648 has 20 divisors (see below), whose sum is σ = 539921048. Its totient is φ = 69667200.

The previous prime is 209001613. The next prime is 209001649. The reversal of 209001648 is 846100902.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (209001649) 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 3 ways as a sum of consecutive naturals, for example, 2177053 + ... + 2177148.

Almost surely, 2^209001648 is an apocalyptic number.

It is an amenable number.

209001648 is an abundant number, since it is smaller than the sum of its proper divisors (330919400).

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

209001648 is a wasteful number, since it uses less digits than its factorization.

209001648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4354212 (or 4354206 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 209001648 is about 14456.8892919604. The cubic root of 209001648 is about 593.4487738461.

The spelling of 209001648 in words is "two hundred nine million, one thousand, six hundred forty-eight".