1326632636 has 48 divisors (see below), whose sum is σ = 2713492992. Its totient is φ = 555768000.

The previous prime is 1326632633. The next prime is 1326632651. The reversal of 1326632636 is 6362366231.

It is a self number, because there is not a number n which added to its sum of digits gives 1326632636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326632633) 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, 282911 + ... + 287561.

It is an arithmetic number, because the mean of its divisors is an integer number (56531104).

Almost surely, 2^1326632636 is an apocalyptic number.

It is an amenable number.

1326632636 is an abundant number, since it is smaller than the sum of its proper divisors (1386860356).

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

1326632636 is a wasteful number, since it uses less digits than its factorization.

1326632636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4890 (or 4888 counting only the distinct ones).

The product of its digits is 139968, while the sum is 38.

The square root of 1326632636 is about 36422.9685226232. The cubic root of 1326632636 is about 1098.7955510872.

Adding to 1326632636 its reverse (6362366231), we get a palindrome (7688998867).

The spelling of 1326632636 in words is "one billion, three hundred twenty-six million, six hundred thirty-two thousand, six hundred thirty-six".