164238660 has 72 divisors (see below), whose sum is σ = 524422080. Its totient is φ = 41491008.

The previous prime is 164238643. The next prime is 164238673. The reversal of 164238660 is 66832461.

164238660 is a `hidden beast` number, since 1 + 642 + 3 + 8 + 6 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 20592 + ... + 27431.

It is an arithmetic number, because the mean of its divisors is an integer number (7283640).

Almost surely, 2^164238660 is an apocalyptic number.

164238660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164238660 is an abundant number, since it is smaller than the sum of its proper divisors (360183420).

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

164238660 is a wasteful number, since it uses less digits than its factorization.

164238660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48057 (or 48052 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 164238660 is about 12815.5631948034. The cubic root of 164238660 is about 547.6357579154.

The spelling of 164238660 in words is "one hundred sixty-four million, two hundred thirty-eight thousand, six hundred sixty".