1326917980 has 12 divisors (see below), whose sum is σ = 2786527800. Its totient is φ = 530767184.

The previous prime is 1326917947. The next prime is 1326918011. The reversal of 1326917980 is 897196231.

It is a happy number.

It is a super-2 number, since 2×1326917980² = 3521422651294560800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1326917980.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33172930 + ... + 33172969.

It is an arithmetic number, because the mean of its divisors is an integer number (232210650).

Almost surely, 2^1326917980 is an apocalyptic number.

1326917980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1326917980 is an abundant number, since it is smaller than the sum of its proper divisors (1459609820).

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

1326917980 is a wasteful number, since it uses less digits than its factorization.

1326917980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66345908 (or 66345906 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 1326917980 is about 36426.8854007586. The cubic root of 1326917980 is about 1098.8743250277.

The spelling of 1326917980 in words is "one billion, three hundred twenty-six million, nine hundred seventeen thousand, nine hundred eighty".