404164531 has 8 divisors (see below), whose sum is σ = 408504320. Its totient is φ = 399847752.

The previous prime is 404164517. The next prime is 404164543. The reversal of 404164531 is 135461404.

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 404164531 - 2⁵ = 404164499 is a prime.

It is a super-2 number, since 2×404164531² = 326697936236899922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404164531.

It is not an unprimeable number, because it can be changed into a prime (404164231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30790 + ... + 41908.

It is an arithmetic number, because the mean of its divisors is an integer number (51063040).

Almost surely, 2^404164531 is an apocalyptic number.

404164531 is a deficient number, since it is larger than the sum of its proper divisors (4339789).

404164531 is a wasteful number, since it uses less digits than its factorization.

404164531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11505.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 404164531 is about 20103.8436872156. The cubic root of 404164531 is about 739.3545205258.

The spelling of 404164531 in words is "four hundred four million, one hundred sixty-four thousand, five hundred thirty-one".