1330 has 16 divisors (see below), whose sum is σ = 2880. Its totient is φ = 432.

The previous prime is 1327. The next prime is 1361. The reversal of 1330 is 331.

1330 = T_{1} + T_{2} + ... +
T_{19}.

It is a happy number.

1330 is nontrivially palindromic in base 11.

It is a Cunningham number, because it is equal to 11^{3}-1.

1330 is a nontrivial binomial coefficient, being equal to C(21, 3).

It is a sliding number, since 1330 = 80 + 1250 and 1/80 + 1/1250 = 0.01330.

It is a Harshad number since it is a multiple of its sum of digits (7).

1330 is a nontrivial repdigit in base 11.

It is a plaindrome in base 11.

It is a nialpdrome in base 11 and base 16.

It is a zygodrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is the 19-th tetrahedral number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61 + ... + 79.

It is an arithmetic number, because the mean of its divisors is an integer number (180).

1330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1330 is an abundant number, since it is smaller than the sum of its proper divisors (1550).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440).

1330 is a wasteful number, since it uses less digits than its factorization.

With its successor (1331) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (33).

1330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33.

The product of its (nonzero) digits is 9, while the sum is 7.

The square root of 1330 is about 36.4691650576. The cubic root of 1330 is about 10.9972444889.

Adding to 1330 its reverse (331), we get a palindrome (1661).

Subtracting from 1330 its reverse (331), we obtain a palindrome (999).

The spelling of 1330 in words is "one thousand, three hundred thirty".

• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.106 sec. • engine limits •