404228399 has 4 divisors (see below), whose sum is σ = 404493960. Its totient is φ = 403962840.

The previous prime is 404228369. The next prime is 404228413. The reversal of 404228399 is 993822404.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404228399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404228339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130484 + ... + 133545.

It is an arithmetic number, because the mean of its divisors is an integer number (101123490).

Almost surely, 2^404228399 is an apocalyptic number.

404228399 is a deficient number, since it is larger than the sum of its proper divisors (265561).

404228399 is a wasteful number, since it uses less digits than its factorization.

404228399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265560.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 404228399 is about 20105.4320769289. The cubic root of 404228399 is about 739.3934639129.

The spelling of 404228399 in words is "four hundred four million, two hundred twenty-eight thousand, three hundred ninety-nine".