164349690 has 32 divisors (see below), whose sum is σ = 395297280. Its totient is φ = 43731264.

The previous prime is 164349683. The next prime is 164349733. The reversal of 164349690 is 96943461.

It is a super-2 number, since 2×164349690² = 54021641206192200, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 15.

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 15 ways as a sum of consecutive naturals, for example, 8652 + ... + 20088.

It is an arithmetic number, because the mean of its divisors is an integer number (12353040).

Almost surely, 2^164349690 is an apocalyptic number.

164349690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164349690 is an abundant number, since it is smaller than the sum of its proper divisors (230947590).

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

164349690 is a wasteful number, since it uses less digits than its factorization.

164349690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11926.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 164349690 is about 12819.8943053365. The cubic root of 164349690 is about 547.7591358939.

The spelling of 164349690 in words is "one hundred sixty-four million, three hundred forty-nine thousand, six hundred ninety".