1304304638 has 96 divisors (see below), whose sum is σ = 2597585760. Its totient is φ = 486017280.

The previous prime is 1304304619. The next prime is 1304304679. The reversal of 1304304638 is 8364034031.

It is a super-2 number, since 2×1304304638² = 3402421177416622088, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1588268 + ... + 1589088.

It is an arithmetic number, because the mean of its divisors is an integer number (27058185).

Almost surely, 2^1304304638 is an apocalyptic number.

1304304638 is a deficient number, since it is larger than the sum of its proper divisors (1293281122).

1304304638 is a wasteful number, since it uses less digits than its factorization.

1304304638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 915 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 1304304638 is about 36115.1580087918. The cubic root of 1304304638 is about 1092.5961844216.

Adding to 1304304638 its reverse (8364034031), we get a palindrome (9668338669).

The spelling of 1304304638 in words is "one billion, three hundred four million, three hundred four thousand, six hundred thirty-eight".