404164181 has 8 divisors (see below), whose sum is σ = 435330720. Its totient is φ = 373987152.

The previous prime is 404164169. The next prime is 404164217. The reversal of 404164181 is 181461404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404164181 - 2¹⁴ = 404147797 is a prime.

It is a super-2 number, since 2×404164181² = 326697370406801522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404164121) by changing a digit.

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, 246530 + ... + 248163.

It is an arithmetic number, because the mean of its divisors is an integer number (54416340).

Almost surely, 2^404164181 is an apocalyptic number.

It is an amenable number.

404164181 is a deficient number, since it is larger than the sum of its proper divisors (31166539).

404164181 is a wasteful number, since it uses less digits than its factorization.

404164181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494755.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 404164181 is about 20103.8349824107. The cubic root of 404164181 is about 739.3543071027.

The spelling of 404164181 in words is "four hundred four million, one hundred sixty-four thousand, one hundred eighty-one".