164399238 has 12 divisors (see below), whose sum is σ = 356198388. Its totient is φ = 54799740.

The previous prime is 164399219. The next prime is 164399243. The reversal of 164399238 is 832993461.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 164399193 and 164399202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4566628 + ... + 4566663.

It is an arithmetic number, because the mean of its divisors is an integer number (29683199).

Almost surely, 2^164399238 is an apocalyptic number.

164399238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

164399238 is an abundant number, since it is smaller than the sum of its proper divisors (191799150).

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

164399238 is a wasteful number, since it uses less digits than its factorization.

164399238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9133299 (or 9133296 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 164399238 is about 12821.8266249392. The cubic root of 164399238 is about 547.8141763440.

The spelling of 164399238 in words is "one hundred sixty-four million, three hundred ninety-nine thousand, two hundred thirty-eight".