209044128 has 48 divisors (see below), whose sum is σ = 550156320. Its totient is φ = 69501696.

The previous prime is 209044111. The next prime is 209044153. The reversal of 209044128 is 821440902.

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

It is a junction number, because it is equal to n+sod(n) for n = 209044095 and 209044104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37626 + ... + 42822.

It is an arithmetic number, because the mean of its divisors is an integer number (11461590).

Almost surely, 2^209044128 is an apocalyptic number.

It is an amenable number.

209044128 is an abundant number, since it is smaller than the sum of its proper divisors (341112192).

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

209044128 is a wasteful number, since it uses less digits than its factorization.

209044128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5629 (or 5621 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 209044128 is about 14458.3584130426. The cubic root of 209044128 is about 593.4889776697.

The spelling of 209044128 in words is "two hundred nine million, forty-four thousand, one hundred twenty-eight".