164019720 has 32 divisors (see below), whose sum is σ = 492059520. Its totient is φ = 43738560.

The previous prime is 164019697. The next prime is 164019731. The reversal of 164019720 is 27910461.

It is a happy number.

164019720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

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, 683296 + ... + 683535.

It is an arithmetic number, because the mean of its divisors is an integer number (15376860).

Almost surely, 2^164019720 is an apocalyptic number.

164019720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164019720 is an abundant number, since it is smaller than the sum of its proper divisors (328039800).

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

164019720 is a wasteful number, since it uses less digits than its factorization.

164019720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366845 (or 1366841 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 164019720 is about 12807.0183883682. The cubic root of 164019720 is about 547.3923059169.

The spelling of 164019720 in words is "one hundred sixty-four million, nineteen thousand, seven hundred twenty".