330640428 has 24 divisors (see below), whose sum is σ = 772762032. Its totient is φ = 110032384.

The previous prime is 330640411. The next prime is 330640481. The reversal of 330640428 is 824046033.

It is a junction number, because it is equal to n+sod(n) for n = 330640395 and 330640404.

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, 14925 + ... + 29732.

It is an arithmetic number, because the mean of its divisors is an integer number (32198418).

Almost surely, 2^330640428 is an apocalyptic number.

It is an amenable number.

330640428 is an abundant number, since it is smaller than the sum of its proper divisors (442121604).

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

330640428 is a wasteful number, since it uses less digits than its factorization.

330640428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45281 (or 45279 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 330640428 is about 18183.5207811909. The cubic root of 330640428 is about 691.4890673128.

It can be divided in two parts, 3306 and 40428, that added together give a palindrome (43734).

The spelling of 330640428 in words is "three hundred thirty million, six hundred forty thousand, four hundred twenty-eight".