330809780 has 90 divisors (see below), whose sum is σ = 820317666. Its totient is φ = 112053984.

The previous prime is 330809761. The next prime is 330809821. The reversal of 330809780 is 87908033.

330809780 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 only one way, i.e., 264647824 + 66161956 = 16268^2 + 8134^2 .

It is a super-2 number, since 2×330809780² = 218870221087296800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3985619 + ... + 3985701.

Almost surely, 2^330809780 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 330809780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410158833).

330809780 is an abundant number, since it is smaller than the sum of its proper divisors (489507886).

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

330809780 is an frugal number, since it uses more digits than its factorization.

330809780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 330809780 is about 18188.1769289833. The cubic root of 330809780 is about 691.6071059824.

The spelling of 330809780 in words is "three hundred thirty million, eight hundred nine thousand, seven hundred eighty".