1305842490 has 48 divisors (see below), whose sum is σ = 3474158688. Its totient is φ = 340125408.

The previous prime is 1305842401. The next prime is 1305842513. The reversal of 1305842490 is 942485031.

1305842490 is a `hidden beast` number, since 1 + 30 + 584 + 2 + 49 + 0 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164844 + ... + 172583.

It is an arithmetic number, because the mean of its divisors is an integer number (72378306).

Almost surely, 2^1305842490 is an apocalyptic number.

1305842490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1305842490 is an abundant number, since it is smaller than the sum of its proper divisors (2168316198).

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

1305842490 is a wasteful number, since it uses less digits than its factorization.

1305842490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337483 (or 337480 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1305842490 is about 36136.4426860199. The cubic root of 1305842490 is about 1093.0254275189.

The spelling of 1305842490 in words is "one billion, three hundred five million, eight hundred forty-two thousand, four hundred ninety".