1004405320 has 16 divisors (see below), whose sum is σ = 2259912060. Its totient is φ = 401762112.

The previous prime is 1004405273. The next prime is 1004405323. The reversal of 1004405320 is 235044001.

It can be written as a sum of positive squares in 2 ways, for example, as 982070244 + 22335076 = 31338^2 + 4726^2 .

It is not an unprimeable number, because it can be changed into a prime (1004405323) 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, 12555027 + ... + 12555106.

Almost surely, 2^1004405320 is an apocalyptic number.

1004405320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1004405320 is an abundant number, since it is smaller than the sum of its proper divisors (1255506740).

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

1004405320 is a wasteful number, since it uses less digits than its factorization.

1004405320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25110144 (or 25110140 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1004405320 is about 31692.3542830128. The cubic root of 1004405320 is about 1001.4662889459.

Adding to 1004405320 its reverse (235044001), we get a palindrome (1239449321).

The spelling of 1004405320 in words is "one billion, four million, four hundred five thousand, three hundred twenty".