1266032320 has 224 divisors, whose sum is σ = 3669304320. Its totient is φ = 406425600.

The previous prime is 1266032303. The next prime is 1266032321. The reversal of 1266032320 is 232306621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is not an unprimeable number, because it can be changed into a prime (1266032321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6426462 + ... + 6426658.

Almost surely, 2^1266032320 is an apocalyptic number.

1266032320 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 1266032320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1834652160).

1266032320 is an abundant number, since it is smaller than the sum of its proper divisors (2403272000).

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

1266032320 is a wasteful number, since it uses less digits than its factorization.

1266032320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 1266032320 is about 35581.3479227530. The cubic root of 1266032320 is about 1081.8032061918.

Adding to 1266032320 its reverse (232306621), we get a palindrome (1498338941).

The spelling of 1266032320 in words is "one billion, two hundred sixty-six million, thirty-two thousand, three hundred twenty".