1266636432 has 80 divisors (see below), whose sum is σ = 3333897728. Its totient is φ = 414305280.

The previous prime is 1266636431. The next prime is 1266636439. The reversal of 1266636432 is 2346366621.

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

It is not an unprimeable number, because it can be changed into a prime (1266636431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780582 + ... + 782202.

Almost surely, 2^1266636432 is an apocalyptic number.

1266636432 is a gapful number since it is divisible by the number (12) 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 1266636432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666948864).

1266636432 is an abundant number, since it is smaller than the sum of its proper divisors (2067261296).

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

1266636432 is a wasteful number, since it uses less digits than its factorization.

1266636432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928 (or 1922 counting only the distinct ones).

The product of its digits is 186624, while the sum is 39.

The square root of 1266636432 is about 35589.8360771724. The cubic root of 1266636432 is about 1081.9752466596.

The spelling of 1266636432 in words is "one billion, two hundred sixty-six million, six hundred thirty-six thousand, four hundred thirty-two".