164744220 has 24 divisors (see below), whose sum is σ = 461283984. Its totient is φ = 43931776.

The previous prime is 164744219. The next prime is 164744227. The reversal of 164744220 is 22447461.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164744227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372809 + ... + 1372928.

It is an arithmetic number, because the mean of its divisors is an integer number (19220166).

Almost surely, 2^164744220 is an apocalyptic number.

164744220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164744220 is an abundant number, since it is smaller than the sum of its proper divisors (296539764).

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

164744220 is a wasteful number, since it uses less digits than its factorization.

164744220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745749 (or 2745747 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 164744220 is about 12835.2724941857. The cubic root of 164744220 is about 548.1970937557.

The spelling of 164744220 in words is "one hundred sixty-four million, seven hundred forty-four thousand, two hundred twenty".