164091860 has 24 divisors (see below), whose sum is σ = 356476680. Its totient is φ = 63373184.

The previous prime is 164091859. The next prime is 164091877. The reversal of 164091860 is 68190461.

It can be written as a sum of positive squares in 4 ways, for example, as 48916036 + 115175824 = 6994^2 + 10732^2 .

It is a super-2 number, since 2×164091860² = 53852277036519200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164091860.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140879 + ... + 142038.

It is an arithmetic number, because the mean of its divisors is an integer number (14853195).

Almost surely, 2^164091860 is an apocalyptic number.

164091860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164091860 is an abundant number, since it is smaller than the sum of its proper divisors (192384820).

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

164091860 is a wasteful number, since it uses less digits than its factorization.

164091860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282955 (or 282953 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 164091860 is about 12809.8345032245. The cubic root of 164091860 is about 547.4725464574.

The spelling of 164091860 in words is "one hundred sixty-four million, ninety-one thousand, eight hundred sixty".