4391428 has 12 divisors (see below), whose sum is σ = 7872732. Its totient is φ = 2142080.

The previous prime is 4391417. The next prime is 4391437. The reversal of 4391428 is 8241934.

It can be written as a sum of positive squares in 2 ways, for example, as 399424 + 3992004 = 632^2 + 1998^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4391428.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13225 + ... + 13552.

It is an arithmetic number, because the mean of its divisors is an integer number (656061).

Almost surely, 2^4391428 is an apocalyptic number.

It is an amenable number.

4391428 is a deficient number, since it is larger than the sum of its proper divisors (3481304).

4391428 is a wasteful number, since it uses less digits than its factorization.

4391428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26822 (or 26820 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 4391428 is about 2095.5734298755. The cubic root of 4391428 is about 163.7577724881.

The spelling of 4391428 in words is "four million, three hundred ninety-one thousand, four hundred twenty-eight".