1326640215 has 8 divisors (see below), whose sum is σ = 2122624368. Its totient is φ = 707541440.

The previous prime is 1326640201. The next prime is 1326640219. The reversal of 1326640215 is 5120466231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1326640215 - 2⁷ = 1326640087 is a prime.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44221326 + ... + 44221355.

It is an arithmetic number, because the mean of its divisors is an integer number (265328046).

Almost surely, 2^1326640215 is an apocalyptic number.

1326640215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1326640215 is a deficient number, since it is larger than the sum of its proper divisors (795984153).

1326640215 is an equidigital number, since it uses as much as digits as its factorization.

1326640215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88442689.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1326640215 is about 36423.0725639669. The cubic root of 1326640215 is about 1098.7976435418.

The spelling of 1326640215 in words is "one billion, three hundred twenty-six million, six hundred forty thousand, two hundred fifteen".