1320002000 has 40 divisors (see below), whose sum is σ = 3191769672. Its totient is φ = 528000000.

The previous prime is 1320001951. The next prime is 1320002023. The reversal of 1320002000 is 2000231.

It can be written as a sum of positive squares in 4 ways, for example, as 68823616 + 1251178384 = 8296^2 + 35372^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328001 + ... + 332000.

Almost surely, 2^1320002000 is an apocalyptic number.

1320002000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320002000 is an abundant number, since it is smaller than the sum of its proper divisors (1871767672).

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

1320002000 is an equidigital number, since it uses as much as digits as its factorization.

1320002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660024 (or 660008 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 1320002000 is about 36331.8317732536. The cubic root of 1320002000 is about 1096.9618645071.

Adding to 1320002000 its reverse (2000231), we get a palindrome (1322002231).

The spelling of 1320002000 in words is "one billion, three hundred twenty million, two thousand".