1268449280 has 204 divisors, whose sum is σ = 3586102560. Its totient is φ = 429391872.

The previous prime is 1268449277. The next prime is 1268449297. The reversal of 1268449280 is 829448621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16056281 + ... + 16056359.

Almost surely, 2^1268449280 is an apocalyptic number.

1268449280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1268449280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1793051280).

1268449280 is an abundant number, since it is smaller than the sum of its proper divisors (2317653280).

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

1268449280 is an frugal number, since it uses more digits than its factorization.

1268449280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 1268449280 is about 35615.2955905184. The cubic root of 1268449280 is about 1082.4911857222.

The spelling of 1268449280 in words is "one billion, two hundred sixty-eight million, four hundred forty-nine thousand, two hundred eighty".