4642220 has 24 divisors (see below), whose sum is σ = 10635408. Its totient is φ = 1688000.

The previous prime is 4642199. The next prime is 4642223. The reversal of 4642220 is 222464.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4642192 and 4642201.

It is not an unprimeable number, because it can be changed into a prime (4642223) 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, 10331 + ... + 10770.

It is an arithmetic number, because the mean of its divisors is an integer number (443142).

Almost surely, 2^4642220 is an apocalyptic number.

It is an amenable number.

4642220 is an abundant number, since it is smaller than the sum of its proper divisors (5993188).

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

4642220 is a wasteful number, since it uses less digits than its factorization.

4642220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21121 (or 21119 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4642220 is about 2154.5811657953. The cubic root of 4642220 is about 166.8176143586.

Adding to 4642220 its reverse (222464), we get a palindrome (4864684).

The spelling of 4642220 in words is "four million, six hundred forty-two thousand, two hundred twenty".