4345220 has 24 divisors (see below), whose sum is σ = 9955008. Its totient is φ = 1580000.

The previous prime is 4345207. The next prime is 4345223. The reversal of 4345220 is 225434.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a d-powerful number, because it can be written as 4 + 3⁹ + 4¹¹ + 5³ + 2⁵ + 2¹⁷ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 4345192 and 4345201.

It is not an unprimeable number, because it can be changed into a prime (4345223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9656 + ... + 10095.

It is an arithmetic number, because the mean of its divisors is an integer number (414792).

Almost surely, 2^4345220 is an apocalyptic number.

It is an amenable number.

4345220 is an abundant number, since it is smaller than the sum of its proper divisors (5609788).

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

4345220 is a wasteful number, since it uses less digits than its factorization.

4345220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19771 (or 19769 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 4345220 is about 2084.5191291998. The cubic root of 4345220 is about 163.1813756300.

The spelling of 4345220 in words is "four million, three hundred forty-five thousand, two hundred twenty".