404069 has 4 divisors (see below), whose sum is σ = 408096. Its totient is φ = 400044.

The previous prime is 404051. The next prime is 404081. The reversal of 404069 is 960404.

404069 = 366² + 367² + 368².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404069 is a prime.

It is a super-2 number, since 2×404069² = 326543513522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1859 + ... + 2064.

It is an arithmetic number, because the mean of its divisors is an integer number (102024).

2⁴⁰⁴⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

404069 is a deficient number, since it is larger than the sum of its proper divisors (4027).

404069 is a wasteful number, since it uses less digits than its factorization.

404069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 404069 is about 635.6642195373. The cubic root of 404069 is about 73.9296263028.

The spelling of 404069 in words is "four hundred four thousand, sixty-nine".