1004003220 has 48 divisors (see below), whose sum is σ = 3066775488. Its totient is φ = 243394560.

The previous prime is 1004003219. The next prime is 1004003279. The reversal of 1004003220 is 223004001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1004003196 and 1004003205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 759949 + ... + 761268.

It is an arithmetic number, because the mean of its divisors is an integer number (63891156).

Almost surely, 2^1004003220 is an apocalyptic number.

1004003220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1004003220 is an abundant number, since it is smaller than the sum of its proper divisors (2062772268).

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

1004003220 is a wasteful number, since it uses less digits than its factorization.

1004003220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521240 (or 1521238 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1004003220 is about 31686.0098466184. The cubic root of 1004003220 is about 1001.3326299751.

Adding to 1004003220 its reverse (223004001), we get a palindrome (1227007221).

The spelling of 1004003220 in words is "one billion, four million, three thousand, two hundred twenty".