8420330 has 16 divisors (see below), whose sum is σ = 15226920. Its totient is φ = 3352512.

The previous prime is 8420327. The next prime is 8420351. The reversal of 8420330 is 330248.

8420330 = 66² + 67² + ... + 294².

8420330 is digitally balanced in base 2, 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 8404201 + 16129 = 2899^2 + 127^2 .

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, 452 + ... + 4128.

Almost surely, 2^8420330 is an apocalyptic number.

8420330 is a deficient number, since it is larger than the sum of its proper divisors (6806590).

8420330 is a wasteful number, since it uses less digits than its factorization.

8420330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 8420330 is about 2901.7804879074. The cubic root of 8420330 is about 203.4431339840.

Adding to 8420330 its reverse (330248), we get a palindrome (8750578).

The spelling of 8420330 in words is "eight million, four hundred twenty thousand, three hundred thirty".