1304909690 has 24 divisors (see below), whose sum is σ = 2732322132. Its totient is φ = 447397440.

The previous prime is 1304909689. The next prime is 1304909693. The reversal of 1304909690 is 969094031.

It can be written as a sum of positive squares in 2 ways, for example, as 1182740881 + 122168809 = 34391^2 + 11053^2 .

It is a super-2 number, since 2×1304909690² = 3405578598111792200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1304909693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1331051 + ... + 1332030.

Almost surely, 2^1304909690 is an apocalyptic number.

1304909690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1304909690 is an abundant number, since it is smaller than the sum of its proper divisors (1427412442).

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

1304909690 is a wasteful number, since it uses less digits than its factorization.

1304909690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663102 (or 2663095 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 1304909690 is about 36123.5337418697. The cubic root of 1304909690 is about 1092.7651059275.

The spelling of 1304909690 in words is "one billion, three hundred four million, nine hundred nine thousand, six hundred ninety".