1327320820 has 120 divisors (see below), whose sum is σ = 3292093728. Its totient is φ = 449467200.

The previous prime is 1327320803. The next prime is 1327320833. The reversal of 1327320820 is 280237231.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6290515 + ... + 6290725.

Almost surely, 2^1327320820 is an apocalyptic number.

1327320820 is a gapful number since it is divisible by the number (10) 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 1327320820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1646046864).

1327320820 is an abundant number, since it is smaller than the sum of its proper divisors (1964772908).

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

1327320820 is a wasteful number, since it uses less digits than its factorization.

1327320820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1327320820 is about 36432.4144135411. The cubic root of 1327320820 is about 1098.9855164629.

The spelling of 1327320820 in words is "one billion, three hundred twenty-seven million, three hundred twenty thousand, eight hundred twenty".