209628016 has 20 divisors (see below), whose sum is σ = 437397352. Its totient is φ = 96751296.

The previous prime is 209627989. The next prime is 209628047. The reversal of 209628016 is 610826902.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503706 + ... + 504121.

Almost surely, 2^209628016 is an apocalyptic number.

209628016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

209628016 is an abundant number, since it is smaller than the sum of its proper divisors (227769336).

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

209628016 is a wasteful number, since it uses less digits than its factorization.

209628016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007848 (or 1007842 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 209628016 is about 14478.5363901190. The cubic root of 209628016 is about 594.0410285045.

The spelling of 209628016 in words is "two hundred nine million, six hundred twenty-eight thousand, sixteen".