330731380 has 72 divisors (see below), whose sum is σ = 811479816. Its totient is φ = 112896000.

The previous prime is 330731353. The next prime is 330731383. The reversal of 330731380 is 83137033.

330731380 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 509796 + 330221584 = 714^2 + 18172^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (330731383) 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 23 ways as a sum of consecutive naturals, for example, 274780 + ... + 275980.

It is an arithmetic number, because the mean of its divisors is an integer number (11270553).

Almost surely, 2^330731380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 330731380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405739908).

330731380 is an abundant number, since it is smaller than the sum of its proper divisors (480748436).

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

330731380 is a wasteful number, since it uses less digits than its factorization.

330731380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505 (or 1496 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 330731380 is about 18186.0215550296. The cubic root of 330731380 is about 691.5524660409.

It can be divided in two parts, 33073 and 1380, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 330731380 in words is "three hundred thirty million, seven hundred thirty-one thousand, three hundred eighty".