164128090 has 32 divisors (see below), whose sum is σ = 342270720. Its totient is φ = 55499904.

The previous prime is 164128087. The next prime is 164128103. The reversal of 164128090 is 90821461.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 10950 + ... + 21169.

It is an arithmetic number, because the mean of its divisors is an integer number (10695960).

Almost surely, 2^164128090 is an apocalyptic number.

164128090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164128090 is an abundant number, since it is smaller than the sum of its proper divisors (178142630).

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

164128090 is a wasteful number, since it uses less digits than its factorization.

164128090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32206.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 164128090 is about 12811.2485730314. The cubic root of 164128090 is about 547.5128358229.

The spelling of 164128090 in words is "one hundred sixty-four million, one hundred twenty-eight thousand, ninety".