1304638380 has 48 divisors (see below), whose sum is σ = 4058876640. Its totient is φ = 347903424.

The previous prime is 1304638373. The next prime is 1304638393. The reversal of 1304638380 is 838364031.

It is a happy number.

1304638380 is a `hidden beast` number, since 13 + 0 + 4 + 638 + 3 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 1207459 + ... + 1208538.

It is an arithmetic number, because the mean of its divisors is an integer number (84559930).

Almost surely, 2^1304638380 is an apocalyptic number.

1304638380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304638380 is an abundant number, since it is smaller than the sum of its proper divisors (2754238260).

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

1304638380 is a wasteful number, since it uses less digits than its factorization.

1304638380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416015 (or 2416007 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1304638380 is about 36119.7782385219. The cubic root of 1304638380 is about 1092.6893666757.

The spelling of 1304638380 in words is "one billion, three hundred four million, six hundred thirty-eight thousand, three hundred eighty".