4220328 has 32 divisors (see below), whose sum is σ = 12058560. Its totient is φ = 1205760.

The previous prime is 4220327. The next prime is 4220347. The reversal of 4220328 is 8230224.

It is a super-2 number, since 2×4220328² = 35622336855168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4220323) 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, 12393 + ... + 12728.

It is an arithmetic number, because the mean of its divisors is an integer number (376830).

Almost surely, 2^4220328 is an apocalyptic number.

It is an amenable number.

4220328 is an abundant number, since it is smaller than the sum of its proper divisors (7838232).

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

4220328 is a wasteful number, since it uses less digits than its factorization.

4220328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25137 (or 25133 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 4220328 is about 2054.3436908171. The cubic root of 4220328 is about 161.6027455992.

It can be divided in two parts, 42 and 20328, that multiplied together give a square (853776 = 924²).

The spelling of 4220328 in words is "four million, two hundred twenty thousand, three hundred twenty-eight".