404249423 has 4 divisors (see below), whose sum is σ = 404289768. Its totient is φ = 404209080.

The previous prime is 404249413. The next prime is 404249431. The reversal of 404249423 is 324942404.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 404249423 - 2¹⁰ = 404248399 is a prime.

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 404249423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404249413) 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, 7640 + ... + 29442.

It is an arithmetic number, because the mean of its divisors is an integer number (101072442).

Almost surely, 2^404249423 is an apocalyptic number.

404249423 is a deficient number, since it is larger than the sum of its proper divisors (40345).

404249423 is a wasteful number, since it uses less digits than its factorization.

404249423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40344.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 404249423 is about 20105.9549139055. The cubic root of 404249423 is about 739.4062823581.

The spelling of 404249423 in words is "four hundred four million, two hundred forty-nine thousand, four hundred twenty-three".