1268689608 has 64 divisors (see below), whose sum is σ = 3529248000. Its totient is φ = 422283456.

The previous prime is 1268689531. The next prime is 1268689613. The reversal of 1268689608 is 8069868621.

It is a happy number.

1268689608 is a `hidden beast` number, since 1 + 26 + 8 + 6 + 8 + 9 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159633 + ... + 167391.

It is an arithmetic number, because the mean of its divisors is an integer number (55144500).

Almost surely, 2^1268689608 is an apocalyptic number.

1268689608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1268689608 is an abundant number, since it is smaller than the sum of its proper divisors (2260558392).

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

1268689608 is a wasteful number, since it uses less digits than its factorization.

1268689608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8531 (or 8521 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 1268689608 is about 35618.6693743604. The cubic root of 1268689608 is about 1082.5595464935.

The spelling of 1268689608 in words is "one billion, two hundred sixty-eight million, six hundred eighty-nine thousand, six hundred eight".