1304004020 has 48 divisors (see below), whose sum is σ = 3025209600. Its totient is φ = 468174720.

The previous prime is 1304004007. The next prime is 1304004047. The reversal of 1304004020 is 204004031.

It is a junction number, because it is equal to n+sod(n) for n = 1304003986 and 1304004004.

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, 20135 + ... + 54894.

It is an arithmetic number, because the mean of its divisors is an integer number (63025200).

Almost surely, 2^1304004020 is an apocalyptic number.

1304004020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304004020 is an abundant number, since it is smaller than the sum of its proper divisors (1721205580).

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

1304004020 is a wasteful number, since it uses less digits than its factorization.

1304004020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75128 (or 75126 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1304004020 is about 36110.9958322946. The cubic root of 1304004020 is about 1092.5122369276.

Adding to 1304004020 its reverse (204004031), we get a palindrome (1508008051).

The spelling of 1304004020 in words is "one billion, three hundred four million, four thousand, twenty".