2209164378 has 32 divisors (see below), whose sum is σ = 4682180160. Its totient is φ = 693651840.

The previous prime is 2209164323. The next prime is 2209164379. The reversal of 2209164378 is 8734619022.

It is not an unprimeable number, because it can be changed into a prime (2209164379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147700 + ... + 161967.

It is an arithmetic number, because the mean of its divisors is an integer number (146318130).

Almost surely, 2^2209164378 is an apocalyptic number.

2209164378 is an abundant number, since it is smaller than the sum of its proper divisors (2473015782).

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

2209164378 is a wasteful number, since it uses less digits than its factorization.

2209164378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309742.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 2209164378 is about 47001.7486695974. The cubic root of 2209164378 is about 1302.3948710406.

The spelling of 2209164378 in words is "two billion, two hundred nine million, one hundred sixty-four thousand, three hundred seventy-eight".