164449188 has 18 divisors (see below), whose sum is σ = 415691094. Its totient is φ = 54816384.

The previous prime is 164449171. The next prime is 164449189. The reversal of 164449188 is 881944461.

164449188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 142993764 + 21455424 = 11958^2 + 4632^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (164449189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2283981 + ... + 2284052.

Almost surely, 2^164449188 is an apocalyptic number.

164449188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

164449188 is an abundant number, since it is smaller than the sum of its proper divisors (251241906).

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

164449188 is a wasteful number, since it uses less digits than its factorization.

164449188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4568043 (or 4568038 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 164449188 is about 12823.7743273968. The cubic root of 164449188 is about 547.8696521633.

The spelling of 164449188 in words is "one hundred sixty-four million, four hundred forty-nine thousand, one hundred eighty-eight".