404221530 has 16 divisors (see below), whose sum is σ = 970131744. Its totient is φ = 107792400.

The previous prime is 404221487. The next prime is 404221547. The reversal of 404221530 is 35122404.

It is a junction number, because it is equal to n+sod(n) for n = 404221497 and 404221506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6736996 + ... + 6737055.

It is an arithmetic number, because the mean of its divisors is an integer number (60633234).

Almost surely, 2^404221530 is an apocalyptic number.

404221530 is an abundant number, since it is smaller than the sum of its proper divisors (565910214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404221530 is a wasteful number, since it uses less digits than its factorization.

404221530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13474061.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 404221530 is about 20105.2612517221. The cubic root of 404221530 is about 739.3892757506.

Adding to 404221530 its reverse (35122404), we get a palindrome (439343934).

The spelling of 404221530 in words is "four hundred four million, two hundred twenty-one thousand, five hundred thirty".