1266304000 has 176 divisors, whose sum is σ = 3406633776. Its totient is φ = 466944000.

The previous prime is 1266303991. The next prime is 1266304003. The reversal of 1266304000 is 4036621.

It can be written as a sum of positive squares in 8 ways, for example, as 1071645696 + 194658304 = 32736^2 + 13952^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266304003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1663620 + ... + 1664380.

Almost surely, 2^1266304000 is an apocalyptic number.

1266304000 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 1266304000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1703316888).

1266304000 is an abundant number, since it is smaller than the sum of its proper divisors (2140329776).

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

1266304000 is an equidigital number, since it uses as much as digits as its factorization.

1266304000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 781 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1266304000 is about 35585.1654485405. The cubic root of 1266304000 is about 1081.8805826458.

The spelling of 1266304000 in words is "one billion, two hundred sixty-six million, three hundred four thousand".