164243388 has 48 divisors (see below), whose sum is σ = 391862016. Its totient is φ = 53529600.

The previous prime is 164243381. The next prime is 164243399. The reversal of 164243388 is 883342461.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164243381) 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, 101788 + ... + 103388.

It is an arithmetic number, because the mean of its divisors is an integer number (8163792).

Almost surely, 2^164243388 is an apocalyptic number.

It is an amenable number.

164243388 is an abundant number, since it is smaller than the sum of its proper divisors (227618628).

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

164243388 is a wasteful number, since it uses less digits than its factorization.

164243388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794 (or 1792 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 164243388 is about 12815.7476566917. The cubic root of 164243388 is about 547.6410128637.

The spelling of 164243388 in words is "one hundred sixty-four million, two hundred forty-three thousand, three hundred eighty-eight".