3220407 has 6 divisors (see below), whose sum is σ = 4651712. Its totient is φ = 2146932.

The previous prime is 3220381. The next prime is 3220409. The reversal of 3220407 is 7040223.

It is a happy number.

It is not a de Polignac number, because 3220407 - 2¹⁶ = 3154871 is a prime.

It is a Duffinian number.

3220407 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3220407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178903 + ... + 178920.

Almost surely, 2^3220407 is an apocalyptic number.

3220407 is a deficient number, since it is larger than the sum of its proper divisors (1431305).

3220407 is a wasteful number, since it uses less digits than its factorization.

3220407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357829 (or 357826 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 3220407 is about 1794.5492470256. The cubic root of 3220407 is about 147.6738465382.

The spelling of 3220407 in words is "three million, two hundred twenty thousand, four hundred seven".