404407 has 4 divisors (see below), whose sum is σ = 406120. Its totient is φ = 402696.

The previous prime is 404399. The next prime is 404419. The reversal of 404407 is 704404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 404407 - 2³ = 404399 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404497) 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, 432 + ... + 997.

It is an arithmetic number, because the mean of its divisors is an integer number (101530).

2⁴⁰⁴⁴⁰⁷ is an apocalyptic number.

404407 is a deficient number, since it is larger than the sum of its proper divisors (1713).

404407 is a wasteful number, since it uses less digits than its factorization.

404407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 404407 is about 635.9300275974. The cubic root of 404407 is about 73.9502343751.

The spelling of 404407 in words is "four hundred four thousand, four hundred seven", and thus it is an iban number.