209215028 has 24 divisors (see below), whose sum is σ = 399911904. Its totient is φ = 94978400.

The previous prime is 209214997. The next prime is 209215031. The reversal of 209215028 is 820512902.

209215028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 39158 + ... + 44178.

It is an arithmetic number, because the mean of its divisors is an integer number (16662996).

Almost surely, 2^209215028 is an apocalyptic number.

It is an amenable number.

209215028 is a deficient number, since it is larger than the sum of its proper divisors (190696876).

209215028 is a wasteful number, since it uses less digits than its factorization.

209215028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983 (or 5981 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 209215028 is about 14464.2672818225. The cubic root of 209215028 is about 593.6506654432.

The spelling of 209215028 in words is "two hundred nine million, two hundred fifteen thousand, twenty-eight".