164219238 has 20 divisors (see below), whose sum is σ = 367973100. Its totient is φ = 54739692.

The previous prime is 164219219. The next prime is 164219239. The reversal of 164219238 is 832912461.

164219238 is a `hidden beast` number, since 1 + 642 + 1 + 9 + 2 + 3 + 8 = 666.

164219238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164219239) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 506688 + ... + 507011.

It is an arithmetic number, because the mean of its divisors is an integer number (18398655).

Almost surely, 2^164219238 is an apocalyptic number.

164219238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

164219238 is an abundant number, since it is smaller than the sum of its proper divisors (203753862).

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

164219238 is a wasteful number, since it uses less digits than its factorization.

164219238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013713 (or 1013704 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 164219238 is about 12814.8054218548. The cubic root of 164219238 is about 547.6141702231.

The spelling of 164219238 in words is "one hundred sixty-four million, two hundred nineteen thousand, two hundred thirty-eight".