1268355789 has 12 divisors (see below), whose sum is σ = 1833859872. Its totient is φ = 844744200.

The previous prime is 1268355763. The next prime is 1268355791. The reversal of 1268355789 is 9875538621.

1268355789 is a `hidden beast` number, since 1 + 2 + 6 + 8 + 3 + 557 + 89 = 666.

It is not a de Polignac number, because 1268355789 - 2⁷ = 1268355661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268355709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59067 + ... + 77624.

It is an arithmetic number, because the mean of its divisors is an integer number (152821656).

Almost surely, 2^1268355789 is an apocalyptic number.

It is an amenable number.

1268355789 is a deficient number, since it is larger than the sum of its proper divisors (565504083).

1268355789 is a wasteful number, since it uses less digits than its factorization.

1268355789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137728 (or 137725 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 1268355789 is about 35613.9830544128. The cubic root of 1268355789 is about 1082.4645900800.

The spelling of 1268355789 in words is "one billion, two hundred sixty-eight million, three hundred fifty-five thousand, seven hundred eighty-nine".