1326640216 has 16 divisors (see below), whose sum is σ = 2713582440. Its totient is φ = 603018240.

The previous prime is 1326640201. The next prime is 1326640219. The reversal of 1326640216 is 6120466231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326640219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7537641 + ... + 7537816.

Almost surely, 2^1326640216 is an apocalyptic number.

It is an amenable number.

1326640216 is an abundant number, since it is smaller than the sum of its proper divisors (1386942224).

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

1326640216 is a wasteful number, since it uses less digits than its factorization.

1326640216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15075474 (or 15075470 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1326640216 is about 36423.0725776945. The cubic root of 1326640216 is about 1098.7976438179.

The spelling of 1326640216 in words is "one billion, three hundred twenty-six million, six hundred forty thousand, two hundred sixteen".