1268440904 has 8 divisors (see below), whose sum is σ = 2378326710. Its totient is φ = 634220448.

The previous prime is 1268440897. The next prime is 1268440913. The reversal of 1268440904 is 4090448621.

It can be written as a sum of positive squares in only one way, i.e., 1248208900 + 20232004 = 35330^2 + 4498^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 79277549 + ... + 79277564.

Almost surely, 2^1268440904 is an apocalyptic number.

It is an amenable number.

1268440904 is a deficient number, since it is larger than the sum of its proper divisors (1109885806).

1268440904 is a wasteful number, since it uses less digits than its factorization.

1268440904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158555119 (or 158555115 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 1268440904 is about 35615.1780003975. The cubic root of 1268440904 is about 1082.4888030317.

The spelling of 1268440904 in words is "one billion, two hundred sixty-eight million, four hundred forty thousand, nine hundred four".