1004804220 has 384 divisors, whose sum is σ = 3576545280. Its totient is φ = 205793280.

The previous prime is 1004804137. The next prime is 1004804233. The reversal of 1004804220 is 224084001.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 17030551 + ... + 17030609.

It is an arithmetic number, because the mean of its divisors is an integer number (9313920).

Almost surely, 2^1004804220 is an apocalyptic number.

1004804220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1004804220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1788272640).

1004804220 is an abundant number, since it is smaller than the sum of its proper divisors (2571741060).

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

1004804220 is a wasteful number, since it uses less digits than its factorization.

1004804220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1004804220 is about 31698.6469742795. The cubic root of 1004804220 is about 1001.5988489862.

Adding to 1004804220 its reverse (224084001), we get a palindrome (1228888221).

The spelling of 1004804220 in words is "one billion, four million, eight hundred four thousand, two hundred twenty".