4220306 has 4 divisors (see below), whose sum is σ = 6330462. Its totient is φ = 2110152.

The previous prime is 4220297. The next prime is 4220323. The reversal of 4220306 is 6030224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2235025 + 1985281 = 1495^2 + 1409^2 .

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055075 + ... + 1055078.

Almost surely, 2^4220306 is an apocalyptic number.

4220306 is a deficient number, since it is larger than the sum of its proper divisors (2110156).

4220306 is a wasteful number, since it uses less digits than its factorization.

4220306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110155.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 4220306 is about 2054.3383363020. The cubic root of 4220306 is about 161.6024647943.

The spelling of 4220306 in words is "four million, two hundred twenty thousand, three hundred six".