209057968 has 40 divisors (see below), whose sum is σ = 464032800. Its totient is φ = 89379840.

The previous prime is 209057963. The next prime is 209057977. The reversal of 209057968 is 869750902.

It is not an unprimeable number, because it can be changed into a prime (209057963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49608 + ... + 53656.

It is an arithmetic number, because the mean of its divisors is an integer number (11600820).

Almost surely, 2^209057968 is an apocalyptic number.

209057968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

209057968 is an abundant number, since it is smaller than the sum of its proper divisors (254974832).

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

209057968 is a wasteful number, since it uses less digits than its factorization.

209057968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525 (or 4519 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 209057968 is about 14458.8370210055. The cubic root of 209057968 is about 593.5020749142.

The spelling of 209057968 in words is "two hundred nine million, fifty-seven thousand, nine hundred sixty-eight".