1304785408 has 20 divisors (see below), whose sum is σ = 2607023430. Its totient is φ = 652392448.

The previous prime is 1304785373. The next prime is 1304785439. The reversal of 1304785408 is 8045874031.

It can be written as a sum of positive squares in only one way, i.e., 1020930304 + 283855104 = 31952^2 + 16848^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1273693 + ... + 1274716.

Almost surely, 2^1304785408 is an apocalyptic number.

It is an amenable number.

1304785408 is a deficient number, since it is larger than the sum of its proper divisors (1302238022).

1304785408 is an frugal number, since it uses more digits than its factorization.

1304785408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548427 (or 2548411 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 1304785408 is about 36121.8134649965. The cubic root of 1304785408 is about 1092.7304125062.

The spelling of 1304785408 in words is "one billion, three hundred four million, seven hundred eighty-five thousand, four hundred eight".