4229820 has 120 divisors (see below), whose sum is σ = 15205344. Its totient is φ = 964224.

The previous prime is 4229809. The next prime is 4229833. The reversal of 4229820 is 289224.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11154 + ... + 11526.

Almost surely, 2^4229820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4229820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7602672).

4229820 is an abundant number, since it is smaller than the sum of its proper divisors (10975524).

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

4229820 is a wasteful number, since it uses less digits than its factorization.

4229820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 4229820 is about 2056.6526201573. The cubic root of 4229820 is about 161.7238092305.

The spelling of 4229820 in words is "four million, two hundred twenty-nine thousand, eight hundred twenty".