1268218488 has 128 divisors (see below), whose sum is σ = 3369960000. Its totient is φ = 397135872.

The previous prime is 1268218477. The next prime is 1268218529. The reversal of 1268218488 is 8848128621.

It is a super-2 number, since 2×1268218488² = 3216756266610012288, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5537958 + ... + 5538186.

Almost surely, 2^1268218488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1268218488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1684980000).

1268218488 is an abundant number, since it is smaller than the sum of its proper divisors (2101741512).

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

1268218488 is a wasteful number, since it uses less digits than its factorization.

1268218488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 445 counting only the distinct ones).

The product of its digits is 393216, while the sum is 48.

The square root of 1268218488 is about 35612.0553745498. The cubic root of 1268218488 is about 1082.4255293171.

The spelling of 1268218488 in words is "one billion, two hundred sixty-eight million, two hundred eighteen thousand, four hundred eighty-eight".