1308943904 has 12 divisors (see below), whose sum is σ = 2576983374. Its totient is φ = 654471936.

The previous prime is 1308943903. The next prime is 1308943921. The reversal of 1308943904 is 4093498031.

It can be written as a sum of positive squares in only one way, i.e., 898800400 + 410143504 = 29980^2 + 20252^2 .

It is a super-2 number, since 2×1308943904² = 3426668287637522432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1308943903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20452217 + ... + 20452280.

Almost surely, 2^1308943904 is an apocalyptic number.

It is an amenable number.

1308943904 is a deficient number, since it is larger than the sum of its proper divisors (1268039470).

1308943904 is an equidigital number, since it uses as much as digits as its factorization.

1308943904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40904507 (or 40904499 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 1308943904 is about 36179.3297892595. The cubic root of 1308943904 is about 1093.8900657892.

The spelling of 1308943904 in words is "one billion, three hundred eight million, nine hundred forty-three thousand, nine hundred four".